TI-57

thumb|upright|TI-57 with LED display thumb|upright|TI-57 with LCD technology for display thumb|upright|TI-57-II (LCD)

The TI-57 is a discontinued product line of programmable calculators made by Texas Instruments between 1977 and 1982. There are three devices by this name made by TI. The first TI-57 devices with LED displays were released in September 1977 along the more powerful TI-58 and TI-59. The original devices have 50 program steps and eight memory registers. Two later versions named TI-57 LCD and TI-57 LCD-II have LCDs, but are less powerful (run much slower) and have much less memory: 48 bytes to be allocated between program 'steps' and storage registers.