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The TI-990 was a series of 16-bit minicomputers sold by Texas Instruments (TI) in the 1970s and 1980s. The TI-990 was a replacement for TI's earlier minicomputer systems, the TI-960 and the TI-980. It had several unique features, and was easier to program than its predecessors.
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The IBM System/360 Model 20 is the smallest member of the IBM System/360 family announced in November 1964. The Model 20 supports only a subset of the System/360 instruction set, with binary numbers limited to 16 bits and no floating point. In later years it would have been classified as a 16-bit minicomputer rather than a mainframe, but the term "minicomputer" was not current, and in any case IBM wanted to emphasize the compatibility of the Model 20 rather than its differences from the rest of the System/360 line. It does, however, have the full System/360 decimal instruction set, that allows for addition, subtraction, product, and dividend of up to 31 decimal digits.
References
- 1 2 Wirth, Niklaus (January 1968). "PL360, a Programming Language for the 360 Computers". Journal of the ACM. 15 (1): 34–74. doi: 10.1145/321439.321442 . S2CID 7376057.
- ↑ Wirth, Niklaus (December 24, 1965). A Programming Language for the 360 Computers (PDF) (Technical report). Stanford University. CS33.
- ↑ Satterthwaite, E. (March 1968). "Notes on Construction of Subsystems within Operating System/360" (PDF). p. 1. CGTM #43.
