Texas Instruments SR-10 Handheld Electronic Calculator

The Texas Instrument Slide Rule-10, more commonly known as the TI SR-10, was a handheld calculator introduced in November 1972, just a few months after TI's first calculator, the Datamath. The SR-10 initially retailed at $149, but was produced in large numbers and soon sold at significant discount. The calculator made use of the TMS0120 single-chip calculator circuit derived from the TMS1802, better known as the first "calculator-on-a-chip."
The calculator had a LED (Light Emitting Diode) display capable of showing 10 decimal digits, and used a NICAD battery pack to power the red numeric display. The user had to constantly charge and recharge the battery after a few hours of use. The NICAD batteries would usually go bad after a few hundred charges. This was a major drawback for early electronic calculators. Later LCD (liquid Crystal Display) devices used so little power that they could run on tiny solar cells.
Currently not on view
Object Name
electronic calculator
Date made
Texas Instruments
Physical Description
plastic (overall material)
metal (overall material)
overall: 1 1/2 in x 3 in x 6 1/4 in; 3.81 cm x 7.62 cm x 15.875 cm
ID Number
catalog number
accession number
Family & Social Life
Computers & Business Machines
See more items in
Medicine and Science: Computers
Data Source
National Museum of American History, Kenneth E. Behring Center
Texas Instruments SR-10 Calculator
Credit Line
Gift of John B. Priser

Visitor Comments

7/19/2013 10:41:05 AM
My brother owned one of these his second year of high school, with the charging unit - bought it for a whopping $119.00, and he was SO proud of it. The LEDs would automatically go dark after about two minutes to preserve battery power, and eventually it had to be plugged in 100% of the time to keep it running. Did the four primary types of math, and introduced me to the concept of square roots long before learning it in 5th grade.
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