TI-59 / TI-58
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The TI-59 is an early programmable calculator, that was manufactured by Texas Instruments from 1977. It is the successor to the TI SR-52, quadrupling the number of "program steps" of storage, and addi
A TI-59 showing a magnetic storage card being inserted into the card reader in the side
The TI-58C
TI-59 mounted on a PC-100A thermal printer
TI-59 main circuit board
HP-67/97
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The HP-67 is a magnetic card-programmable handheld calculator, introduced by Hewlett-Packard in 1976 at an MSRP of $450. A desktop version with built-in thermal printer was sold as the HP-97 at a pric
TI-59 / TI-58
…Here is the same program written for TI Compiler: In comparison to its contemporary main competitor, Hewlett-Packard HP-67, the TI-59 has about twice the memory. The partition between program steps and memories is adjustable in increments of 80 program steps/10 memories…
HP-67
HP-67 in programming mode showing the key code for STO + 6
The magnetic reading head (top) of the HP-67 and a part of the transport mechanism (rubber rollers and cogwheel) of the integrated reader for magnetic cards
HP-67 with Blackbox in action