By far the biggest supercomputer country in Europe today, in number of machines, is the UK with 35 machines: more than twice as much as Germany that has only 17 entries. France is third with 8 systems, and Italy fourth with 7.

Most large countries lost a lot compared to the high of the November 2002 list: Germany dropped from 71 to 17 systems, France from 22 to 8, and Italy from 16 to 7.

The new machines are now leading the European List: a Bull Novascale at Commissariat à l'Energie Atomique (CEA) in France, and an IBM BlueGene in Juelich, Germany. The Mare Nostrum system in Barcelona is now in third position.

The following table lists Europe's current TOP20.

<table>

<tr><td>All machines in Europe in the June 2006 supercomputer list, sorted by Rmax performance.</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr>

<tr><td>Rank</td><td>Country </td><td>World Rank </td><td>Manufacturer </td><td>Computer </td><td>Rmax </td><td>Installation Site </td><td>Year </td></tr>

<tr><td>1</td><td>France</td><td>5</td><td>Bull SA</td><td>Tera-10 - NovaScale 5160, Itanium2 1.6 GHz, Quadrics</td><td>42900</td><td>Commissariat à l'Energie Atomique (CEA)</td><td>2006</td></tr>

<tr><td>2</td><td>Germany</td><td>8</td><td>IBM</td><td>JUBL - eServer Blue Gene Solution</td><td>37330</td><td>Forschungszentrum Juelich (FZJ)</td><td>2006</td></tr>

<tr><td>3</td><td>Spain</td><td>11</td><td>IBM</td><td>MareNostrum - JS20 Cluster, PPC 970, 2.2 GHz, Myrinet</td><td>27910</td><td>Barcelona Supercomputer Center</td><td>2005</td></tr>

<tr><td>4</td><td>Netherlands</td><td>12</td><td>IBM</td><td>Stella - eServer Blue Gene Solution</td><td>27450</td><td>ASTRON/University Groningen</td><td>2005</td></tr>

<tr><td>5</td><td>Switzerland</td><td>16</td><td>IBM</td><td>eServer Blue Gene Solution</td><td>18200</td><td>Ecole Polytechnique Federale de Lausanne</td><td>2005</td></tr>

<tr><td>6</td><td>United Kingdom</td><td>30</td><td>Cray Inc.</td><td>Cray XT3, 2.6 GHz</td><td>11810</td><td>Atomic Weapons Establishment</td><td>2006</td></tr>

<tr><td>7</td><td>Switzerland</td><td>40</td><td>IBM</td><td>eServer Blue Gene Solution</td><td>9360</td><td>IBM Research</td><td>2005</td></tr>

<tr><td>8</td><td>United Kingdom</td><td>42</td><td>IBM</td><td>eServer pSeries 690 (1.9 GHz Power4+)</td><td>9241</td><td>ECMWF</td><td>2004</td></tr>

<tr><td>9</td><td>United Kingdom</td><td>43</td><td>IBM</td><td>eServer pSeries 690 (1.9 GHz Power4+)</td><td>9241</td><td>ECMWF</td><td>2004</td></tr>

<tr><td>10</td><td>Germany</td><td>48</td><td>NEC</td><td>SX8/576M72</td><td>8923</td><td>HWW/Universitaet Stuttgart</td><td>2005/td></tr>

</table>

The TOP10 European system is within the world TOP50. So 20% of the TOP10 is European and 20% of the TOP50 is European.

The next figure shows that over the years the performance of the European machines was more or less 20% of the overall system performance. Hence 20% seems a long term European average for its presence in the TOP500.

Next figure illustrates the rise and fall of Europe, and the main European countries.