<?xml version="1.0"?><top500:list authors="Hans Meuer, Erich Strohmaier, Jack Dongarra, Horst D. 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Watson Research Center</top500:installation-site-name>         <top500:installation-site-address>http://www.research.ibm.com</top500:installation-site-address>         <top500:site-id>829</top500:site-id>      </top500:installation-site>      <top500:town>Yorktown Heights</top500:town>      <top500:state>New York</top500:state>      <top500:country>United States</top500:country>      <top500:year>2005</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>40960</top500:number-of-processors>      <top500:r-peak>114688</top500:r-peak>      <top500:n-max>983039</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>5</top500:rank>      <top500:system-id>8443</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>New York Blue - eServer Blue Gene Solution</top500:computer>      <top500:system-address />      <top500:r-max>82161</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Stony Brook/BNL, New York Center for Computional Sciences</top500:installation-site-name>         <top500:installation-site-address>http://www.sunysb.edu/nyccs/</top500:installation-site-address>         <top500:site-id>2736</top500:site-id>      </top500:installation-site>      <top500:town />      <top500:state>New York</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>36864</top500:number-of-processors>      <top500:r-peak>103219</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>6</top500:rank>      <top500:system-id>8128</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>ASC Purple - eServer pSeries p5 575 1.9 GHz</top500:computer>      <top500:system-address>http://www.llnl.gov/asc/computing_resources/purple/purple_index.html</top500:system-address>      <top500:r-max>75760</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>DOE/NNSA/LLNL</top500:installation-site-name>         <top500:installation-site-address>http://www.llnl.gov/</top500:installation-site-address>         <top500:site-id>2556</top500:site-id>      </top500:installation-site>      <top500:town>Livermore</top500:town>      <top500:state>California</top500:state>      <top500:country>United States</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>12208</top500:number-of-processors>      <top500:r-peak>92781</top500:r-peak>      <top500:n-max>1383600</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>7</top500:rank>      <top500:system-id>8449</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>eServer Blue Gene Solution</top500:computer>      <top500:system-address />      <top500:r-max>73032</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Rensselaer Polytechnic Institute, Computional Center for Nanotechnology Innovations</top500:installation-site-name>         <top500:installation-site-address>http://www.rpi.edu/research/ccni/</top500:installation-site-address>         <top500:site-id>2737</top500:site-id>      </top500:installation-site>      <top500:town>Troy</top500:town>      <top500:state>New York</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>32768</top500:number-of-processors>      <top500:r-peak>91750</top500:r-peak>      <top500:n-max>884735</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>8</top500:rank>      <top500:system-id>8757</top500:system-id>      <top500:manufacturer>Dell</top500:manufacturer>      <top500:computer>Abe - PowerEdge 1955, 2.33 GHz, Infiniband</top500:computer>      <top500:system-address />      <top500:r-max>62680</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>NCSA</top500:installation-site-name>         <top500:installation-site-address>http://www.ncsa.uiuc.edu/</top500:installation-site-address>         <top500:site-id>1200</top500:site-id>      </top500:installation-site>      <top500:town>Urbana-Champaign</top500:town>      <top500:state>Illinois</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>9600</top500:number-of-processors>      <top500:r-peak>89587.2</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>9</top500:rank>      <top500:system-id>8242</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>MareNostrum - BladeCenter JS21 Cluster, PPC 970, 2.3 GHz, Myrinet</top500:computer>      <top500:system-address>http://www.bsc.es/</top500:system-address>      <top500:r-max>62630</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Barcelona Supercomputing Center</top500:installation-site-name>         <top500:installation-site-address>http://www.bsc.es/</top500:installation-site-address>         <top500:site-id>2540</top500:site-id>      </top500:installation-site>      <top500:town>Barcelona</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Spain</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>10240</top500:number-of-processors>      <top500:r-peak>94208</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>10</top500:rank>      <top500:system-id>8385</top500:system-id>      <top500:manufacturer>SGI</top500:manufacturer>      <top500:computer>HLRB-II - Altix 4700 1.6 GHz</top500:computer>      <top500:system-address>http://www.lrz-muenchen.de/services/compute/hlrb/</top500:system-address>      <top500:r-max>56520</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Leibniz Rechenzentrum</top500:installation-site-name>         <top500:installation-site-address>http://www.lrz-muenchen.de/</top500:installation-site-address>         <top500:site-id>1027</top500:site-id>      </top500:installation-site>      <top500:town>Muenchen</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Germany</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>9728</top500:number-of-processors>      <top500:r-peak>62259.2</top500:r-peak>      <top500:n-max>1583232</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>11</top500:rank>      <top500:system-id>8114</top500:system-id>      <top500:manufacturer>Dell</top500:manufacturer>      <top500:computer>Thunderbird - PowerEdge 1850, 3.6 GHz, Infiniband</top500:computer>      <top500:system-address>http://www.cs.sandia.gov/platforms/Thunderbird.html</top500:system-address>      <top500:r-max>53000</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>NNSA/Sandia National Laboratories</top500:installation-site-name>         <top500:installation-site-address>http://www.sandia.gov/</top500:installation-site-address>         <top500:site-id>2726</top500:site-id>      </top500:installation-site>      <top500:town>Albuquerque</top500:town>      <top500:state>New Mexico</top500:state>      <top500:country>United States</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>9024</top500:number-of-processors>      <top500:r-peak>64972.8</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>12</top500:rank>      <top500:system-id>8237</top500:system-id>      <top500:manufacturer>Bull SA</top500:manufacturer>      <top500:computer>Tera-10 - NovaScale 5160, Itanium2 1.6 GHz, Quadrics</top500:computer>      <top500:system-address>http://fr.wikipedia.org/wiki/TERA-10</top500:system-address>      <top500:r-max>52840</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Commissariat a l&apos;Energie Atomique (CEA)</top500:installation-site-name>         <top500:installation-site-address>http://www.cea.fr/</top500:installation-site-address>         <top500:site-id>371</top500:site-id>      </top500:installation-site>      <top500:town>Bruyeres-le-Chatel</top500:town>      <top500:state>N/A</top500:state>      <top500:country>France</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>9968</top500:number-of-processors>      <top500:r-peak>63795.2</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>13</top500:rank>      <top500:system-id>7288</top500:system-id>      <top500:manufacturer>SGI</top500:manufacturer>      <top500:computer>Columbia - SGI Altix 1.5 GHz, Voltaire Infiniband</top500:computer>      <top500:system-address>http://www.nas.nasa.gov/About/Projects/Columbia/columbia.html</top500:system-address>      <top500:r-max>51870</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>NASA/Ames Research Center/NAS</top500:installation-site-name>         <top500:installation-site-address>http://www.nas.nasa.gov/</top500:installation-site-address>         <top500:site-id>1188</top500:site-id>      </top500:installation-site>      <top500:town>Mountain View</top500:town>      <top500:state>California</top500:state>      <top500:country>United States</top500:country>      <top500:year>2004</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>10160</top500:number-of-processors>      <top500:r-peak>60960</top500:r-peak>      <top500:n-max>1290240</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>14</top500:rank>      <top500:system-id>8216</top500:system-id>      <top500:manufacturer>NEC/Sun</top500:manufacturer>      <top500:computer>TSUBAME Grid Cluster - Sun Fire x4600 Cluster, Opteron 2.4/2.6 GHz and ClearSpeed Accelerator, Infiniband</top500:computer>      <top500:system-address>http://www.gsic.titech.ac.jp/</top500:system-address>      <top500:r-max>48880</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>GSIC Center, Tokyo Institute of Technology</top500:installation-site-name>         <top500:installation-site-address>http://www.gsic.titech.ac.jp/</top500:installation-site-address>         <top500:site-id>690</top500:site-id>      </top500:installation-site>      <top500:town>Tokyo</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Japan</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>11088</top500:number-of-processors>      <top500:r-peak>78796.8</top500:r-peak>      <top500:n-max>1057536</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>15</top500:rank>      <top500:system-id>8393</top500:system-id>      <top500:manufacturer>Dell</top500:manufacturer>      <top500:computer>Lonestar - PowerEdge 1955, 2.66 GHz, Infiniband</top500:computer>      <top500:system-address>http://www.tacc.utexas.edu/resources/hpcsystems/#lonestar</top500:system-address>      <top500:r-max>46730</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Texas Advanced Computing Center/Univ. of Texas</top500:installation-site-name>         <top500:installation-site-address>http://www.tacc.utexas.edu/</top500:installation-site-address>         <top500:site-id>1739</top500:site-id>      </top500:installation-site>      <top500:town>Austin</top500:town>      <top500:state>Texas</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>5848</top500:number-of-processors>      <top500:r-peak>62220</top500:r-peak>      <top500:n-max>1187200</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>16</top500:rank>      <top500:system-id>8209</top500:system-id>      <top500:manufacturer>Dell</top500:manufacturer>      <top500:computer>Jaws - PowerEdge 1955, 3.0 GHz, Infiniband</top500:computer>      <top500:system-address />      <top500:r-max>42390</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Maui High-Performance Computing Center (MHPCC)</top500:installation-site-name>         <top500:installation-site-address>http://www.mhpcc.edu/</top500:installation-site-address>         <top500:site-id>1106</top500:site-id>      </top500:installation-site>      <top500:town />      <top500:state>N/A</top500:state>      <top500:country>United States</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>5200</top500:number-of-processors>      <top500:r-peak>62400</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>17</top500:rank>      <top500:system-id>8527</top500:system-id>      <top500:manufacturer>Linux Networx</top500:manufacturer>      <top500:computer>Michael J. Muuss Cluster (MJM) - Evolocity II (LS Supersystem) Xeon 51xx 3.0 GHz IB</top500:computer>      <top500:system-address />      <top500:r-max>40610</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>US Army Research Laboratory (ARL)</top500:installation-site-name>         <top500:installation-site-address>http://www.arl.mil/</top500:installation-site-address>         <top500:site-id>1820</top500:site-id>      </top500:installation-site>      <top500:town>Aberdeen</top500:town>      <top500:state>Maryland</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>4416</top500:number-of-processors>      <top500:r-peak>52992</top500:r-peak>      <top500:n-max>917104</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>18</top500:rank>      <top500:system-id>8039</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>JUBL - eServer Blue Gene Solution</top500:computer>      <top500:system-address>http://www.fz-juelich.de/zam/ibm-bgl</top500:system-address>      <top500:r-max>37330</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Forschungszentrum Juelich (FZJ)</top500:installation-site-name>         <top500:installation-site-address>http://www.fz-juelich.de</top500:installation-site-address>         <top500:site-id>649</top500:site-id>      </top500:installation-site>      <top500:town>Juelich</top500:town>      <top500:state>Nordrhein-Westfalen</top500:state>      <top500:country>Germany</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>16384</top500:number-of-processors>      <top500:r-peak>45875</top500:r-peak>      <top500:n-max>663551</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>19</top500:rank>      <top500:system-id>5628</top500:system-id>      <top500:manufacturer>NEC</top500:manufacturer>      <top500:computer>Earth-Simulator</top500:computer>      <top500:system-address>http://www.es.jamstec.go.jp/esc/eng/ES/index.html</top500:system-address>      <top500:r-max>35860</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>The Earth Simulator Center</top500:installation-site-name>         <top500:installation-site-address>http://www.es.jamstec.go.jp/esc/eng/ESC/index.html</top500:installation-site-address>         <top500:site-id>2101</top500:site-id>      </top500:installation-site>      <top500:town>Yokohama</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Japan</top500:country>      <top500:year>2002</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>5120</top500:number-of-processors>      <top500:r-peak>40960</top500:r-peak>      <top500:n-max>1075200</top500:n-max>      <top500:n-half>266240</top500:n-half>   </top500:site>   <top500:site>      <top500:rank>20</top500:rank>      <top500:system-id>8373</top500:system-id>      <top500:manufacturer>Cray Inc.</top500:manufacturer>      <top500:computer>Sapphire - Cray XT3, 2.6 GHz dual Core</top500:computer>      <top500:system-address>http://www.erdc.hpc.mil/documentation/XT3_Docs/hardware#content</top500:system-address>      <top500:r-max>35200</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>ERDC MSRC</top500:installation-site-name>         <top500:installation-site-address>http://www.erdc.usace.army.mil/</top500:installation-site-address>         <top500:site-id>549</top500:site-id>      </top500:installation-site>      <top500:town>Vicksburg</top500:town>      <top500:state>Mississippi</top500:state>      <top500:country>United States</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>8192</top500:number-of-processors>      <top500:r-peak>42598.4</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>21</top500:rank>      <top500:system-id>8511</top500:system-id>      <top500:manufacturer>Bull SA</top500:manufacturer>      <top500:computer>CEA-CCRT-Platine - Novascale 3045, Itanium2 1.6 GHz, Infiniband</top500:computer>      <top500:system-address />      <top500:r-max>35130</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Commissariat a l&apos;Energie Atomique (CEA)</top500:installation-site-name>         <top500:installation-site-address>http://www.cea.fr/</top500:installation-site-address>         <top500:site-id>371</top500:site-id>      </top500:installation-site>      <top500:town>Bruyeres-le-Chatel</top500:town>      <top500:state>N/A</top500:state>      <top500:country>France</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>6144</top500:number-of-processors>      <top500:r-peak>39321</top500:r-peak>      <top500:n-max>1320000</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>22</top500:rank>      <top500:system-id>8508</top500:system-id>      <top500:manufacturer>Dell</top500:manufacturer>      <top500:computer>Queen Bee - PowerEdge 1950, 2.33 GHz, Infiniband</top500:computer>      <top500:system-address />      <top500:r-max>34780</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Louisiana Optical Network Initiative</top500:installation-site-name>         <top500:installation-site-address>http://loni.org/</top500:installation-site-address>         <top500:site-id>2747</top500:site-id>      </top500:installation-site>      <top500:town>Baton Rouge</top500:town>      <top500:state>Louisiana</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>5440</top500:number-of-processors>      <top500:r-peak>50766.1</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>23</top500:rank>      <top500:system-id>8196</top500:system-id>      <top500:manufacturer>Cray Inc.</top500:manufacturer>      <top500:computer>Cray XT3, 2.6 GHz dual Core</top500:computer>      <top500:system-address />      <top500:r-max>32498</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Atomic Weapons Establishment</top500:installation-site-name>         <top500:installation-site-address>http://www.awe.co.uk</top500:installation-site-address>         <top500:site-id>141</top500:site-id>      </top500:installation-site>      <top500:town>Aldermaston</top500:town>      <top500:state>N/A</top500:state>      <top500:country>United Kingdom</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Classified</top500:area-of-installation>      <top500:number-of-processors>7812</top500:number-of-processors>      <top500:r-peak>40622</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>24</top500:rank>      <top500:system-id>8507</top500:system-id>      <top500:manufacturer>Dell</top500:manufacturer>      <top500:computer>Topsail - PowerEdge 1955, 2.33 GHz, Cisco/Topspin Infiniband</top500:computer>      <top500:system-address>http://its.unc.edu/reco/research-support/topsail.html</top500:system-address>      <top500:r-max>28770</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>University of North Carolina</top500:installation-site-name>         <top500:installation-site-address>http://www.unc.edu/</top500:installation-site-address>         <top500:site-id>1968</top500:site-id>      </top500:installation-site>      <top500:town>Chapel Hill</top500:town>      <top500:state>North Carolina</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>4160</top500:number-of-processors>      <top500:r-peak>38821.1</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>25</top500:rank>      <top500:system-id>7389</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>Stella - eServer Blue Gene Solution</top500:computer>      <top500:system-address>http://www.rug.nl/rc/hpcv/computing/index</top500:system-address>      <top500:r-max>27450</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>ASTRON/University Groningen</top500:installation-site-name>         <top500:installation-site-address>http://www.lofar.org</top500:installation-site-address>         <top500:site-id>2555</top500:site-id>      </top500:installation-site>      <top500:town>Groningen</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Netherlands</top500:country>      <top500:year>2005</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>12288</top500:number-of-processors>      <top500:r-peak>34406.4</top500:r-peak>      <top500:n-max>516095</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>26</top500:rank>      <top500:system-id>8387</top500:system-id>      <top500:manufacturer>SGI</top500:manufacturer>      <top500:computer>Altix 4700 1.6 GHz</top500:computer>      <top500:system-address />      <top500:r-max>23817</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Wright-Patterson Air Force Base/DoD ASC</top500:installation-site-name>         <top500:installation-site-address>http://www.asc.hpc.mil</top500:installation-site-address>         <top500:site-id>2067</top500:site-id>      </top500:installation-site>      <top500:town>Dayton</top500:town>      <top500:state>Ohio</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>4096</top500:number-of-processors>      <top500:r-peak>26214</top500:r-peak>      <top500:n-max>881664</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>27</top500:rank>      <top500:system-id>8388</top500:system-id>      <top500:manufacturer>SGI</top500:manufacturer>      <top500:computer>Altix 4700 1.6 GHz</top500:computer>      <top500:system-address />      <top500:r-max>23817</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Wright-Patterson Air Force Base/DoD ASC</top500:installation-site-name>         <top500:installation-site-address>http://www.asc.hpc.mil</top500:installation-site-address>         <top500:site-id>2067</top500:site-id>      </top500:installation-site>      <top500:town>Dayton</top500:town>      <top500:state>Ohio</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>4096</top500:number-of-processors>      <top500:r-peak>26214</top500:r-peak>      <top500:n-max>881664</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>28</top500:rank>      <top500:system-id>8384</top500:system-id>      <top500:manufacturer>Dell</top500:manufacturer>      <top500:computer>CITerra - PowerEdge 1950, 2.33 GHz, Myrinet</top500:computer>      <top500:system-address />      <top500:r-max>22590</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Caltech</top500:installation-site-name>         <top500:installation-site-address>http://www.gps.caltech.edu/</top500:installation-site-address>         <top500:site-id>2670</top500:site-id>      </top500:installation-site>      <top500:town>Pasadena</top500:town>      <top500:state>California</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>4096</top500:number-of-processors>      <top500:r-peak>37700</top500:r-peak>      <top500:n-max>761392</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>29</top500:rank>      <top500:system-id>8532</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>Big Red - BladeCenter JS21 Cluster, PPC 970, 2.5 GHz, Myrinet</top500:computer>      <top500:system-address />      <top500:r-max>21790</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Indiana University</top500:installation-site-name>         <top500:installation-site-address>http://www.indiana.edu/iub/</top500:installation-site-address>         <top500:site-id>876</top500:site-id>      </top500:installation-site>      <top500:town>Bloomington</top500:town>      <top500:state>Indiana</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>3072</top500:number-of-processors>      <top500:r-peak>30720</top500:r-peak>      <top500:n-max>758000</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>30</top500:rank>      <top500:system-id>8617</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>Blue Gene/P Solution</top500:computer>      <top500:system-address />      <top500:r-max>20860</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>IBM - Rochester</top500:installation-site-name>         <top500:installation-site-address>http://www.ibm.com</top500:installation-site-address>         <top500:site-id>2422</top500:site-id>      </top500:installation-site>      <top500:town>Rochester</top500:town>      <top500:state>New York</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Vendor</top500:area-of-installation>      <top500:number-of-processors>8192</top500:number-of-processors>      <top500:r-peak>27850</top500:r-peak>      <top500:n-max>602111</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>31</top500:rank>      <top500:system-id>8359</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>eServer pSeries p5 575 1.9 GHz</top500:computer>      <top500:system-address />      <top500:r-max>20070</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Naval Oceanographic Office (NAVOCEANO)</top500:installation-site-name>         <top500:installation-site-address>http://www.navo.hpc.mil/</top500:installation-site-address>         <top500:site-id>1276</top500:site-id>      </top500:installation-site>      <top500:town>Bay Saint Louis</top500:town>      <top500:state>Mississippi</top500:state>      <top500:country>United States</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>3072</top500:number-of-processors>      <top500:r-peak>23347.2</top500:r-peak>      <top500:n-max>700000</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>32</top500:rank>      <top500:system-id>8440</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>eServer pSeries p5 575 1.9 GHz</top500:computer>      <top500:system-address />      <top500:r-max>20070</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>IBM Advanced Client Technology Center</top500:installation-site-name>         <top500:installation-site-address>http://www.ibm.com</top500:installation-site-address>         <top500:site-id>2825</top500:site-id>      </top500:installation-site>      <top500:town />      <top500:state>N/A</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Vendor</top500:area-of-installation>      <top500:number-of-processors>3072</top500:number-of-processors>      <top500:r-peak>23347</top500:r-peak>      <top500:n-max>700000</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>33</top500:rank>      <top500:system-id>6762</top500:system-id>      <top500:manufacturer>California Digital Corporation</top500:manufacturer>      <top500:computer>Thunder - Intel Itanium2 Tiger4  1.4GHz - Quadrics</top500:computer>      <top500:system-address>http://www.llnl.gov/linux/thunder/</top500:system-address>      <top500:r-max>19940</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Lawrence Livermore National Laboratory</top500:installation-site-name>         <top500:installation-site-address>http://www.llnl.gov/</top500:installation-site-address>         <top500:site-id>1026</top500:site-id>      </top500:installation-site>      <top500:town>Livermore</top500:town>      <top500:state>California</top500:state>      <top500:country>United States</top500:country>      <top500:year>2004</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>4096</top500:number-of-processors>      <top500:r-peak>22938</top500:r-peak>      <top500:n-max>975000</top500:n-max>      <top500:n-half>110000</top500:n-half>   </top500:site>   <top500:site>      <top500:rank>34</top500:rank>      <top500:system-id>8503</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>xSeries x3550 Cluster Xeon, 3 GHz, Infiniband</top500:computer>      <top500:system-address />      <top500:r-max>19910</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>National Center for High Performance Computing</top500:installation-site-name>         <top500:installation-site-address>http://www.nchc.gov.tw/</top500:installation-site-address>         <top500:site-id>1248</top500:site-id>      </top500:installation-site>      <top500:town>HsinChu</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Taiwan</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>2072</top500:number-of-processors>      <top500:r-peak>24860</top500:r-peak>      <top500:n-max>968000</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>35</top500:rank>      <top500:system-id>8469</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>BladeCenter JS21 Cluster, PPC 970, 2.3 GHz, Myrinet</top500:computer>      <top500:system-address />      <top500:r-max>19039.5</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>University of Reading</top500:installation-site-name>         <top500:installation-site-address>http://www.rdg.ac.uk/</top500:installation-site-address>         <top500:site-id>2678</top500:site-id>      </top500:installation-site>      <top500:town />      <top500:state>N/A</top500:state>      <top500:country>United Kingdom</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>3040</top500:number-of-processors>      <top500:r-peak>27968</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>36</top500:rank>      <top500:system-id>7638</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>Blue Protein - eServer Blue Gene Solution</top500:computer>      <top500:system-address>http://www.cbrc.jp/cbrc/intro/cluster/BlueProtein.eng.html</top500:system-address>      <top500:r-max>18665</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Computational Biology Research Center, AIST</top500:installation-site-name>         <top500:installation-site-address>http://www.cbrc.jp/index.eng.html</top500:installation-site-address>         <top500:site-id>2597</top500:site-id>      </top500:installation-site>      <top500:town>Tokyo</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Japan</top500:country>      <top500:year>2005</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>8192</top500:number-of-processors>      <top500:r-peak>22937.6</top500:r-peak>      <top500:n-max>442367</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>37</top500:rank>      <top500:system-id>8383</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>eServer Blue Gene Solution</top500:computer>      <top500:system-address />      <top500:r-max>18665</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>EDF R&amp;amp;D</top500:installation-site-name>         <top500:installation-site-address>http://www.edf.fr</top500:installation-site-address>         <top500:site-id>2710</top500:site-id>      </top500:installation-site>      <top500:town>Paris</top500:town>      <top500:state>N/A</top500:state>      <top500:country>France</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Industry</top500:area-of-installation>      <top500:number-of-processors>8192</top500:number-of-processors>      <top500:r-peak>22937.6</top500:r-peak>      <top500:n-max>442367</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>38</top500:rank>      <top500:system-id>7388</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>eServer Blue Gene Solution</top500:computer>      <top500:system-address>http://hpc.epfl.ch/</top500:system-address>      <top500:r-max>18665</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Ecole Polytechnique Federale de Lausanne</top500:installation-site-name>         <top500:installation-site-address>http://www.epfl.ch/</top500:installation-site-address>         <top500:site-id>561</top500:site-id>      </top500:installation-site>      <top500:town>Lausanne</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Switzerland</top500:country>      <top500:year>2005</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>8192</top500:number-of-processors>      <top500:r-peak>22937.6</top500:r-peak>      <top500:n-max>442367</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>39</top500:rank>      <top500:system-id>8046</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>KEK/BG Sakura - eServer Blue Gene Solution</top500:computer>      <top500:system-address />      <top500:r-max>18665</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>High Energy Accelerator Research Organization /KEK</top500:installation-site-name>         <top500:installation-site-address>http://www.kek.jp/</top500:installation-site-address>         <top500:site-id>766</top500:site-id>      </top500:installation-site>      <top500:town>Tsukuba</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Japan</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>8192</top500:number-of-processors>      <top500:r-peak>22937.6</top500:r-peak>      <top500:n-max>442367</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>40</top500:rank>      <top500:system-id>8047</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>KEK/BG MOMO - eServer Blue Gene Solution</top500:computer>      <top500:system-address />      <top500:r-max>18665</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>High Energy Accelerator Research Organization /KEK</top500:installation-site-name>         <top500:installation-site-address>http://www.kek.jp/</top500:installation-site-address>         <top500:site-id>766</top500:site-id>      </top500:installation-site>      <top500:town>Tsukuba</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Japan</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>8192</top500:number-of-processors>      <top500:r-peak>22937.6</top500:r-peak>      <top500:n-max>442367</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>41</top500:rank>      <top500:system-id>8076</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>eServer Blue Gene Solution</top500:computer>      <top500:system-address />      <top500:r-max>18665</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>IBM Rochester, On Demand Deep Computing Center</top500:installation-site-name>         <top500:installation-site-address />         <top500:site-id>2683</top500:site-id>      </top500:installation-site>      <top500:town>Rochester</top500:town>      <top500:state>Minnesota</top500:state>      <top500:country>United States</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>8192</top500:number-of-processors>      <top500:r-peak>22937.6</top500:r-peak>      <top500:n-max>442367</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>42</top500:rank>      <top500:system-id>8522</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>BladeCenter HS21 Cluster, Xeon dual core, 2.33 GHz, GigEthernet</top500:computer>      <top500:system-address />      <top500:r-max>18600</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Sinopec ShengLI Oilfield Branch Company, Geophysical Research Institute</top500:installation-site-name>         <top500:installation-site-address>http://www.slof.com/sl_english/slytwb.htm</top500:installation-site-address>         <top500:site-id>2749</top500:site-id>      </top500:installation-site>      <top500:town>DongYing</top500:town>      <top500:state>N/A</top500:state>      <top500:country>China</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Industry</top500:area-of-installation>      <top500:number-of-processors>4096</top500:number-of-processors>      <top500:r-peak>38223.9</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>43</top500:rank>      <top500:system-id>8267</top500:system-id>      <top500:manufacturer>Dell</top500:manufacturer>      <top500:computer>Darwin - PowerEdge 1950, 3.0 GHz, Infinipath</top500:computer>      <top500:system-address />      <top500:r-max>18270</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Cambridge University</top500:installation-site-name>         <top500:installation-site-address>http://www.hpcf.cam.ac.uk/</top500:installation-site-address>         <top500:site-id>298</top500:site-id>      </top500:installation-site>      <top500:town>Cambridge</top500:town>      <top500:state>N/A</top500:state>      <top500:country>United Kingdom</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>2340</top500:number-of-processors>      <top500:r-peak>28080</top500:r-peak>      <top500:n-max>713000</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>44</top500:rank>      <top500:system-id>8386</top500:system-id>      <top500:manufacturer>SGI</top500:manufacturer>      <top500:computer>SGI Altix XE 1300 Cluster Solutions, 2.66GHZ, Infiniband</top500:computer>      <top500:system-address />      <top500:r-max>17310</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>University of Minnesota</top500:installation-site-name>         <top500:installation-site-address>http://www.umn.edu/</top500:installation-site-address>         <top500:site-id>1960</top500:site-id>      </top500:installation-site>      <top500:town>Minneapolis</top500:town>      <top500:state>Minnesota</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>2048</top500:number-of-processors>      <top500:r-peak>21791</top500:r-peak>      <top500:n-max>638448</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>45</top500:rank>      <top500:system-id>8374</top500:system-id>      <top500:manufacturer>Cray Inc.</top500:manufacturer>      <top500:computer>BigBen - Cray XT3, 2.6 GHz dual Core</top500:computer>      <top500:system-address>http://www.psc.edu/machines/cray/xt3/bigben.html</top500:system-address>      <top500:r-max>17000</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Pittsburgh Supercomputing Center</top500:installation-site-name>         <top500:installation-site-address>http://www.psc.edu/</top500:installation-site-address>         <top500:site-id>1418</top500:site-id>      </top500:installation-site>      <top500:town>Pittsburgh</top500:town>      <top500:state>Pennsylvania</top500:state>      <top500:country>United States</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>4136</top500:number-of-processors>      <top500:r-peak>21507.2</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>46</top500:rank>      <top500:system-id>8758</top500:system-id>      <top500:manufacturer>Dell</top500:manufacturer>      <top500:computer>T3 - PowerEdge 1955, 2.66 GHz, Infiniband</top500:computer>      <top500:system-address />      <top500:r-max>16680</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>NCSA</top500:installation-site-name>         <top500:installation-site-address>http://www.ncsa.uiuc.edu/</top500:installation-site-address>         <top500:site-id>1200</top500:site-id>      </top500:installation-site>      <top500:town>Urbana-Champaign</top500:town>      <top500:state>Illinois</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>2048</top500:number-of-processors>      <top500:r-peak>21300</top500:r-peak>      <top500:n-max>650000</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>47</top500:rank>      <top500:system-id>8454</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>eServer pSeries p5 575 1.9 GHz</top500:computer>      <top500:system-address />      <top500:r-max>16202</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>ECMWF</top500:installation-site-name>         <top500:installation-site-address>http://www.ecmwf.int/</top500:installation-site-address>         <top500:site-id>530</top500:site-id>      </top500:installation-site>      <top500:town>Reading</top500:town>      <top500:state>N/A</top500:state>      <top500:country>United Kingdom</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>2480</top500:number-of-processors>      <top500:r-peak>18848</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>48</top500:rank>      <top500:system-id>8455</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>eServer pSeries p5 575 1.9 GHz</top500:computer>      <top500:system-address />      <top500:r-max>16202</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>ECMWF</top500:installation-site-name>         <top500:installation-site-address>http://www.ecmwf.int/</top500:installation-site-address>         <top500:site-id>530</top500:site-id>      </top500:installation-site>      <top500:town>Reading</top500:town>      <top500:state>N/A</top500:state>      <top500:country>United Kingdom</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>2480</top500:number-of-processors>      <top500:r-peak>18848</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>49</top500:rank>      <top500:system-id>7741</top500:system-id>      <top500:manufacturer>Self-made</top500:manufacturer>      <top500:computer>MACH5 - Apple XServe, 2.0 GHz, Myrinet</top500:computer>      <top500:system-address>http://www.apple.com/science/profiles/colsa/</top500:system-address>      <top500:r-max>16180</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>COLSA</top500:installation-site-name>         <top500:installation-site-address>http://www.colsa.com/</top500:installation-site-address>         <top500:site-id>362</top500:site-id>      </top500:installation-site>      <top500:town>Huntsville</top500:town>      <top500:state>Alabama</top500:state>      <top500:country>United States</top500:country>      <top500:year>2005</top500:year>      <top500:area-of-installation>Industry</top500:area-of-installation>      <top500:number-of-processors>3072</top500:number-of-processors>      <top500:r-peak>24576</top500:r-peak>      <top500:n-max>750000</top500:n-max>      <top500:n-half>160000</top500:n-half>   </top500:site>   <top500:site>      <top500:rank>50</top500:rank>      <top500:system-id>8381</top500:system-id>      <top500:manufacturer>Hitachi</top500:manufacturer>      <top500:computer>SR11000-J2</top500:computer>      <top500:system-address>http://www.cc.u-tokyo.ac.jp</top500:system-address>      <top500:r-max>15811</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>University of Tokyo</top500:installation-site-name>         <top500:installation-site-address>http://www.u-tokyo.ac.jp/</top500:installation-site-address>         <top500:site-id>1987</top500:site-id>      </top500:installation-site>      <top500:town>Tokyo</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Japan</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>128</top500:number-of-processors>      <top500:r-peak>18841.6</top500:r-peak>      <top500:n-max>645120</top500:n-max>      <top500:n-half>116640</top500:n-half>   </top500:site>   <top500:site>      <top500:rank>51</top500:rank>      <top500:system-id>8519</top500:system-id>      <top500:manufacturer>Sun Microsystems</top500:manufacturer>      <top500:computer>HPC - Pentium4 Xeon, EM64T, Opteron, Opteron dual core, Cluster, Myrinet</top500:computer>      <top500:system-address />      <top500:r-max>15780</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>University of Southern California</top500:installation-site-name>         <top500:installation-site-address>http://www.usc.edu/hpcc</top500:installation-site-address>         <top500:site-id>1983</top500:site-id>      </top500:installation-site>      <top500:town>Los Angeles</top500:town>      <top500:state>California</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>5400</top500:number-of-processors>      <top500:r-peak>20520</top500:r-peak>      <top500:n-max>720000</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>52</top500:rank>      <top500:system-id>7651</top500:system-id>      <top500:manufacturer>Cray Inc.</top500:manufacturer>      <top500:computer>Cray X1E (4GB)</top500:computer>      <top500:system-address />      <top500:r-max>15706</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Korea Meteorological Administration</top500:installation-site-name>         <top500:installation-site-address>http://www.kma.go.kr/</top500:installation-site-address>         <top500:site-id>996</top500:site-id>      </top500:installation-site>      <top500:town>Seoul</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Korea, South</top500:country>      <top500:year>2005</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>1020</top500:number-of-processors>      <top500:r-peak>18442</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>53</top500:rank>      <top500:system-id>8404</top500:system-id>      <top500:manufacturer>Dell</top500:manufacturer>      <top500:computer>Bio-X2 - PowerEdge 1950, 2.33 GHz, Infiniband</top500:computer>      <top500:system-address>http://www.stanford.edu/group/bioxcluster/</top500:system-address>      <top500:r-max>15570</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Stanford University/Biomedical Computational Facility</top500:installation-site-name>         <top500:installation-site-address>http://biox.stanford.edu/</top500:installation-site-address>         <top500:site-id>1630</top500:site-id>      </top500:installation-site>      <top500:town>Palo Alto</top500:town>      <top500:state>California</top500:state>      <top500:country>United States</top500:country>      <top500:year>2007</top500:year>      <top500:area-of-installation>Academic</top500:area-of-installation>      <top500:number-of-processors>2208</top500:number-of-processors>      <top500:r-peak>20578</top500:r-peak>      <top500:n-max>730000</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>54</top500:rank>      <top500:system-id>8361</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>eServer pSeries p5 575 1.9 GHz</top500:computer>      <top500:system-address />      <top500:r-max>15470</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>National Centers for Environmental Prediction</top500:installation-site-name>         <top500:installation-site-address>http://www.ncep.noaa.gov/</top500:installation-site-address>         <top500:site-id>1249</top500:site-id>      </top500:installation-site>      <top500:town>Camp Spring</top500:town>      <top500:state>Maryland</top500:state>      <top500:country>United States</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>2368</top500:number-of-processors>      <top500:r-peak>17996.8</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>55</top500:rank>      <top500:system-id>8362</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>eServer pSeries p5 575 1.9 GHz</top500:computer>      <top500:system-address />      <top500:r-max>15470</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>National Centers for Environmental Prediction</top500:installation-site-name>         <top500:installation-site-address>http://www.ncep.noaa.gov/</top500:installation-site-address>         <top500:site-id>1249</top500:site-id>      </top500:installation-site>      <top500:town>Camp Spring</top500:town>      <top500:state>Maryland</top500:state>      <top500:country>United States</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>2368</top500:number-of-processors>      <top500:r-peak>17996.8</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>56</top500:rank>      <top500:system-id>8208</top500:system-id>      <top500:manufacturer>Linux Networx</top500:manufacturer>      <top500:computer>Humvee - Evolocity II (LS Supersystem)</top500:computer>      <top500:system-address />      <top500:r-max>15200</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>US Army Research Laboratory (ARL)</top500:installation-site-name>         <top500:installation-site-address>http://www.arl.mil/</top500:installation-site-address>         <top500:site-id>1820</top500:site-id>      </top500:installation-site>      <top500:town>Aberdeen</top500:town>      <top500:state>Maryland</top500:state>      <top500:country>United States</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>3368</top500:number-of-processors>      <top500:r-peak>19660</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>57</top500:rank>      <top500:system-id>7652</top500:system-id>      <top500:manufacturer>Cray Inc.</top500:manufacturer>      <top500:computer>Cray X1E (2GB)</top500:computer>      <top500:system-address />      <top500:r-max>14955</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Oak Ridge National Laboratory</top500:installation-site-name>         <top500:installation-site-address>http://www.csm.ornl.gov/</top500:installation-site-address>         <top500:site-id>1333</top500:site-id>      </top500:installation-site>      <top500:town>Oak Ridge</top500:town>      <top500:state>Tennessee</top500:state>      <top500:country>United States</top500:country>      <top500:year>2005</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>1014</top500:number-of-processors>      <top500:r-peak>18333</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>58</top500:rank>      <top500:system-id>8268</top500:system-id>      <top500:manufacturer>SGI</top500:manufacturer>      <top500:computer>Altix 4700 1.6 GHz</top500:computer>      <top500:system-address />      <top500:r-max>14593</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Japan Marine Science and Technology</top500:installation-site-name>         <top500:installation-site-address>http://www.jamstec.go.jp/</top500:installation-site-address>         <top500:site-id>946</top500:site-id>      </top500:installation-site>      <top500:town>Yokosuka</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Japan</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>2560</top500:number-of-processors>      <top500:r-peak>16384</top500:r-peak>      <top500:n-max>483800</top500:n-max>      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>59</top500:rank>      <top500:system-id>8375</top500:system-id>      <top500:manufacturer>Cray Inc.</top500:manufacturer>      <top500:computer>Cray XT3, 2.6 GHz dual Core</top500:computer>      <top500:system-address />      <top500:r-max>14220</top500:r-max>      <top500:installation-site>         <top500:installation-site-name>Swiss Scientific Computing Center (CSCS)</top500:installation-site-name>         <top500:installation-site-address>http://www.cscs.ch</top500:installation-site-address>         <top500:site-id>1660</top500:site-id>      </top500:installation-site>      <top500:town>Manno</top500:town>      <top500:state>N/A</top500:state>      <top500:country>Switzerland</top500:country>      <top500:year>2006</top500:year>      <top500:area-of-installation>Research</top500:area-of-installation>      <top500:number-of-processors>3328</top500:number-of-processors>      <top500:r-peak>17305.6</top500:r-peak>      <top500:n-max />      <top500:n-half />   </top500:site>   <top500:site>      <top500:rank>60</top500:rank>      <top500:system-id>8241</top500:system-id>      <top500:manufacturer>IBM</top500:manufacturer>      <top500:computer>BladeCenter JS20 Cluster, PPC 970, 2.2 GHz, Myrinet</top500:computer>      <top500:system-address>http://www.bsc.es/</top500:system-address>      <top500:r-max>14000</top500:r-max>      <top500:installation-site>         <top500:installation