3B series computers

The 3B series computers^[1]^[2] are a line of minicomputers^[3] made between the late 1970s and 1993 by AT&T Computer Systems' Western Electric subsidiary, for use with the company's UNIX operating system. The line primarily consists of the models 3B20, 3B5, 3B15, 3B2, and 3B4000. The series is notable for controlling a series of electronic switching systems for telecommunications, for general computing purposes, and for serving as the historical software porting base for commercial UNIX.

^ Andrew Pollack (March 28, 1984). "AT&T Offers Its Computers". The New York Times.
^ Cite error: The named reference 3Bseries.RoyNYT890316 was invoked but never defined (see the help page).
^ "Digital Introduces Computer Series". The New York Times. March 25, 1987.

[3Bseries.NYT840328-1] Andrew Pollack (March 28, 1984). "AT&T Offers Its Computers". The New York Times.

[3Bseries.RoyNYT890316-2] Cite error: The named reference 3Bseries.RoyNYT890316 was invoked but never defined (see the help page).

[3B2.600NYT870325-3] "Digital Introduces Computer Series". The New York Times. March 25, 1987.

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