Lord Brawl says ASCI is short for: Accelerated Strategic Computing Initiative the "red" part, anyone?
Currently the world's most powerful supercomputer. Its 2500 square feet hardware resides with Sandia National Labs, Albuquerque, USA.
It was built from 9536 Pentium II Xeon and 606 Gigabytes of RAM. It can do 1.3 teraFLOPS.
It runs on the Cougar Operating System.
It was built by the US' Department of Energy for simulating the effects of nuclear weapons, because "live" testing may no longer be done.