U.S. supercomputer makers are expected to dominate this year's list of the world's fastest supercomputers. The list of world's fastest supercomputers will be released at the 20th International Supercomputer Conference (June 22-24) in Heidelberg, Germany. IBM Corp. is expected to snag three of the top five slots, with Silicon Graphics Inc. (Mountain View, Calif.) taking third. NEC Corp. is the only non-U.S. supercomputer maker expected to make the list. The fastest supercomputer list will be released by the TOP500 organization, which is an independent judge of supercomputer performance. The TOP500 project originated in 1993 and each year provides a nonpartisan method of measuring supercomputer performance. IBM's BlueGene/L supercomputer is expected to remain at the top of the TOP500 list, delivering peak performace of 91.8 teraflops.