It was 1973 at the University of Florida in Gainesville. Priser See more items in Medicine and Science: Computers Family & Social Life Work Computers & Business Machines Handheld Electronic Calculators Exhibition My Computing Device Exhibition Location National Museum of American History Data Source Paper (instruction manual, sticker material) Measurements United States: Texas, Dallas Physical Description Object NameĮlectronic calculator Handheld date made The online Datamath Museum includes versions of the SR-10 from 1972, 1973, and 1975. Guy Ball and Bruce Flamm, The Complete Collector’s Guide to Pocket Calculators, Tustin, CA: Wilson/Barnett, 1997, p. The second version (introduced 1973) and the third (introduced 1975) did. The first version of the device, introduced in 1972, did not have the mark SR-10 on the keyboard. Texas Instruments described the SR-10 as an “electronic slide rule calculator,” hence the “SR” in the name. A warranty registration on the inside of the back page indicates these instructions were originally sold with an SR-10 calculator with serial number 170334, purchased on September 27, 1973. It also holds an instruction pamphlet entitled Texas Instruments electronic slide rule calculator SR-10, copyrighted 1973. The leather zippered case has both a loop and a hook for attaching the calculator to a belt. Also in the case is space for three AA nickel-cadmium batteries. This is a TMS0120 chip, manufactured in mid-1973. The largest of these is marked TMS 0120 NC (/) C7333. Unscrewing screws near the top and bottom of the back reveals the workings of the calculator. It also gives the serial number SR10 275812. A sticker on the back gives extensive instructions. The back edge of the calculator has a jack for a recharger/adapter. An on/off switch is right and slightly above this. ![]() A mark behind the display reads: TEXAS INSTRUMENTS. Numbers larger than eight digits are displayed in scientific notation. ![]() Behind the keyboard is a 12-digit LED display. Text above the keyboard, just below the display and to the left, reads: SR10. In addition to ten digit keys, a decimal point key, a total key, and four arithmetic function keys, the calculator has a reciprocal key, a square key, a square root key, a change sign key, an enter exponent key, a clear key, and a clear display key. Twenty-one of these are square, the 0 and the total keys are rectangular. The handheld electronic calculator has a black and ivory-colored plastic case with an array of twenty-three plastic keys. This is an example of the first model of a scientific calculator marketed by Texas Instruments.
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