dcblogs writes: The U.S. has yet to put in place a plan for building exascale systems, as Europe, China, Japan race ahead. The Europeans are prepared to commit up to 3.5 billion Euros to their effort and believe the race is wide open. "The U.S., Europe, China and Japan all have the potential to realize the first exascale system," concluded the European Exascale Software Initiative, the group that's leading Europe's effort, in a report last month. But in the U.S.: "The bottom line is that the US appears stalled and the EU, China, and Japan are gearing up for the next generation,” said Jack Dongarra, a professor of computer science at University of Tennessee, and one of the organizers of the Top 500. In 2008, China had 15 systems on the Top 500 list; it now has 74.