The TI-57 was a programmable calculator made by Texas Instruments between 1977 and 1982. There were three machines by this name made by TI, the first was the TI-57 with LED display released in September 1977 along the more powerful TI-58 and TI-59 .

TI Programmable 57. The self-teaching programming system for student and professionals. Eight multi-use memories provide addressable memory locations to store and recall data. Powerful program memory stores 50 fully merged steps (up to 150 key-strokes). Once a program is built, it can be executed repeatedly by supplying new sets of variables.

TI-57 with Original ROM and Diagnostics. The TI-57 emulator below is one of the most faithful TI-57 emulations currently available. It should run at the same speed as an original device. That includes calculation speed, display speed, and pause delays. It is also using an exact copy of an original TI-57 ROM; no

Texas Instruments introduced the classic TI-57 in 1977, the middle-class member of the programmable calculator family.

A PCjs emulation of the Texas Instruments TI-57 Programmable Calculator is provided below. It is one of the most faithful TI-57 emulations currently available and runs at the same speed as the original device.

I have recently obtained permission from Texas Instruments to post scans of pre-1984 calculator documentation here. Here are the manuals that I have so far managed to scan.

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View and Download TEXAS INSTRUMENTS TI-57 II instruction manual online.

In 1977 the TI-57 replaced the SR-56 and retailers dropped prices on the wonderful 56, enabling this poor high-school senior to buy his first programmable calculator. The 57 used more modern, less expensive, single-chip technology, but TI struggled to approach the capabilities of the 56 with only half the RAM.

Texas Instruments TI-57 Patents. Thanks to research done in 2005 by Mike Sebastian, we know of 9 patents granted to Texas Instruments, all of which describe both the hardware and software of the TI-57 in surprising detail. Of these 9 patents, the first 8 were filed on October 27, 1976, and the last was filed on March 23, 1979.