for. Because the 3B5/3B15 was a large minicomputer with only 1 CPU, it was sometimes referred to as "the body without a brain". The small 3B2 had a desktop design with (supposedly) less expansion capability, but had capacity available for up to 4 CPUs, it was thus also at times referred to as "the brain without a body". The "Companion" was developed, the first "laptop" computer to have a 32-bit CPU and UNIX. The "Alexander" system measured about 14 inches on each side square, and about 5 inches high, featured a unique stacking I/O bus for up to 8 cards, featured compressed Unix filesystems on pluggable ROM cartridges like modern gaming consoles, and used the WE 32100 microprocessor running UNIX SVR3. Both were so outrageous and ahead of their time, they were never marketed. Servers On the large side, the 3B4000 (1986) was the first "snugly coupled" multiprocessor (the "network in a box"), containing the A-BUS which supported 16 large single-board computer (SBC) circuit panels, and featured the first SVR4 distributed UNIX kernel (codenamed "Apache", nothing to do with the open source project started in the 1990s). Although the SBCs did not share address space, the UNIX kernel was distributed across all SBCs in a single virtual image. The StarServer E ("Enterprise" or SSE) was an Intel-based symmetric multiprocessor (SMP), introduced just after the Sequent system, making the SSE the world's second SMP UNIX system, and the first to run System V.4. It featured 4 Intel i486 CPUs. A later design (codenamed "Bigfoot") was to feature 10 Pentium CPUs, but this was never released because of the NCR deal. AT&T-CS also introduced the world's first "PC&C" (personal computer and communication), the famous AT&T Safari laptop, the first to have a built-in modem and networking. This system used an Intel x86 microprocessor, and ran Microsoft software instead of Unix. AT&T-CS also marketed a line of desktop PCs, first using Olivetti as an OEM, later designing its own product line (codename Cascade) using OEM mainboards from Intel. Other innovative designs which were never released included the "Starburst", a distributed Unix kernel message-passing multiprocessor with a fiber-optic switching core, and "Intercept", a unique High-Availability multiprocessor. Partners AT&T-CS also bought OEM systems from Tandem Computers and Pyramid Technology. The Tandem Integrity S2 was renamed the StarServer FT and sold only internally to other AT&T divisions. The Pyramid "System 7000" was a large symmetric multiprocessor,