The IBM Series/1 computer is a 16-bit minicomputer, introduced in 1976, that in many respects competed with other minicomputers of the time, such as the PDP-11 from Digital Equipment Corporation and similar offerings from Data General and HP. The Series/1 was typically used to control and operate external electro-mechanical components while also allowing for primitive data storage and handling.
Although the Series/1 uses EBCDIC character encoding internally and locally attached EBCDIC terminals, ASCII based remote terminals and devices could be attached via an I/O card with a RS-232 interface to be more compatible with competing minicomputers. IBM's own 3101 and 3151 ASCII display terminals are examples of this. This was a departure from IBM mainframes that used 3270 terminals and coaxial attachment and even preceded the IBM PC.
Series/1 computers were withdrawn from marketing in late 1980s.
Read more about IBM Series/1: Models, Software Support, Applications of The Series/1, Series/1 in The Marine Corps
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