Texas Instruments TI Programmable 57
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Texas Instruments TI Programmable 57
- Type: Programmable Semi-Algebraic Electronic Calculator
- Size: 6 x 3 inches / 15 x 8 cm
- Serial/Lot number: 094921/LTA4277
- Date of Manufacture: October 1977
With box, case, instruction book, and pad of coding forms. This is a truly programmable unit, with a good set of branching and testing functions, including the all-important Decrement and Skip on Zero (Dsz) instruction. The 57 doesn't have as many individual functions as the TI-55 (no hyperbolic functions, no unit conversions and [naturally] no factorial function) but any of those things are easily programmed in by someone who properly understands the function to begin with. And you wouldn't have a calculator for math you didn't understand, anyway, right?
This calculator was marketed as a platform to learn calculator programming on, and the instruction book does a fine job of it. It's written for the bright high schooler (or at least I thought so at the time :-)), and this is the calculator I was working on when the scales fell from my eyes. (After that, I felt constrained by the lack of functionality and bought a TI-59 as soon as I had the money.)
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