Texas Instruments TI99/4a

The Texas Instruments TI-99/4A followed the TI99/4, which was let down by a poor keyboard, and was released in 1981. Based on the TMS9900 microprocessor, the TI99/4 was the first 16-bit home computer.

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Texas Instruments TI Programmable 57

Texas Instruments TI Programmable 57

The TI-57 was a programmable calculator made by Texas Instruments from 1977 to 1982, which was followed by the more powerful TI-58 and TI-59. It had 50 program steps and 8 memory registers. I owned a Texas Instruments TI-57 while at university, used very occasionally for ‘real’ problems but mainly just played with the examples…

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