Cray XMS

The Cray XMS was a vector processor minisupercomputer sold by Cray Research from 1990 to 1991. The XMS was originally designed by Supertek Computers Inc. as the Supertek S-1, intended to be a low-cost air-cooled clone of the Cray X-MP with a CMOS re-implementation of the X-MP processor architecture, and a VMEbus-based Input/Output Subsystem (IOS). The XMS could run Cray's UNICOS operating system. Supertek were acquired by Cray Research in 1990, and the S-1 was rebadged XMS by Cray. Its processor had a 55 ns clock period (18.2 MHz clock frequency) and 16 megawords (128 MB) of memory.