Founded in late 1979, ACT Systems built what it called supermicro computers. It’s Turbo-Micro was a multi-user system based on a Z80 CPU and the S-100 bus. By 1984, the system was upgraded to include an Intel 80186 alongside the Z80, but by then the days of the S-100 systems were numbered.
ACT Systems Series 8000 Turbo-Micro (198?, multiuser system)
Base Configuration: 6MHz Z80 and 80186 CPUs
Important Options: 40MB hard disk drive, tape backup, TurboDOS