The Burroughs microcomputer was the B20 series, introduced in 1982. It was a multi-user system that used BTOS, an operating system licensed from Convergent Technologies. Burroughs referred to it as a “distributed intelligence system.” There were two models in the B20 series: the B21 and the B22. The B21 had an unusual form factor where the monitor and CPU unit sat side-by-side on a shared base. The CPU unit was similar in shape and size to the monitor. The B22 added a tower unit that housed storage.