spun the Unix business off as Unix System Laboratories (which was later bought by Novell), canceled its WE 32000 (aka BELLMAC) and CRISP (C Reduced Instruction Set Processor) microprocessor product lines, and just concentrated on networked server computer systems. See also Unix wars. 3B series computers Throughout the 1980s and early 1990s, AT&T-CS produced many "firsts" in the computer world, besides the UNIX operating system itself. The 3B5 and 3B15 were the first computers to be designed with the 32-bit WE 32000 microprocessor, and the 3B15 was the first computer to run a demand-paging version of Unix. There was a project, codenamed "Alice", to develop the 3B5 into an asymmetric multiprocessor with 3 CPUs, but this was canceled in favor of the demand paging 3B15 project, and a few of the "Alice" participants left the company and went to Sequent Computer Systems. The 3B5, 3B15, 3B20S and 3B20D line, begun in 1982, was aimed at the former AT&T subsidiaries the RBOCs. Around 70,000 units were made before production ceased at the Oklahoma City Works (a former Western Electric factory) in 1993. Starting with ATTIS in 1984, development of a commercial version of the 3B hardware commenced. The Motorola 68010-based UNIX PC (aka the 3B1) was released in 1985, developed externally by Convergent Technologies. This product was not a success, in part due to the high margin on the machines; AT&T sold the machine for $8,000 although their cost was approximately $4,000. The next product was the 3B2 product line, which ranged from a 3B2/200 desktop unit, to a 3B2/1000 data center system. These machines were sold with System V Release 2, and later System V Release 3. The 3B2 was the reference platform for SVR3. Desktops The 3B2 was the first desktop supermicrocomputer (1983) with a 32-bit microprocessor and UNIX. The model 300 and 400 series were uniprocessors. The 3B2 became the official "porting base" for UNIX System V Release 3. Later versions were the first to introduce UNIX asymmetric multiprocessing (3B2/600 Falcon) and nearly symmetrical multiprocessing (3B2/1000 Galactica). The Falcon won the highly touted US Air Force Office Automation contract, initially estimated at $1.7 billion, and the largest single computer contract the Federal government had awarded at that time. It was also the first supermicrocomputer to use a first-level cache memory based on virtual addresses instead of physical addresses, which made it 80% faster than the original requirements called