Bolt, Beranek & Newman Inc’s BBN Advanced Computers Inc, Cambridge, Massachusetts, has put its TC2000 parallel supercomputer through the Systems Performance Evaluation Council’s performance benchmark test for multi-processor systems and come up with a SPECthruput rating of 510 – nearest to it, though really an unfair comparison, is Stardent Computer Inc’s four-processor 3040 system which comes in at 91.6 – the TC2000 benchmark incorporated 63 20MHz Motorola 88000 RISC processors. New software for the TC2000 includes an updated nX, Unix operating system and development toolkit. In addition BBN has released a new version of the Berkeley Software Development 4.3-compatible Mach 1000 operating system for its Butterfly GP1000 parallel system, which now complies with Posix 1003.1 and supports X Window System 11.4, along with a new debugger, and C and Fortran compilers.