B90 was an 8 bit machine and was built at Cumbernauld in Scotland, where I worked. The B900 had similar architecture. There was also a B1900 built in Liège i

B90 was an 8 bit machine and was built at Cumbernauld in Scotland, where I worked. The B900 had similar architecture. There was also a B1900 built in Liège in Belgium, which was a 24 bit machine whose instruction set was designed to run virtual machines (i.e. interpreters). Those systems had a reputation for being slow. I don't know much about them. The Liège plant closed around 1982 and the Cumbernauld plant closed around 1985. Burroughs mainframes (B5000 onwards to A series) may be the ones you're thinking of. These are justifiably praised for being ahead of their time. They were high level stack based machines with 48 bit words + 3 tag bits, and programmed directly in an Algol 60 variant, with additional instructions to enable COBOL to execute efficiently. There was no assembly language needed.