Geek Facts for September 21st – A Trio of TI Calculators


In 1972, Texas Instruments (TI) entered the electronic calculator market with the introduction of three models.

TI-2500

Also known as the Datamath, it offered four-function, full-floating decimal point with an eight-digit LED display. Also rechargeable it was originally priced at $149.95 when announced in April of that year, but was priced at $119.95 at launch.

Learn more at http://www.datamath.org/BASIC/DATAMATH/ti-2500-1.htm.

TI-3000

Priced at $84.95, it had an 8-digit display with automatic floating decimal and the four basic math functions.

Learn more at http://www.oldcalculatormuseum.com/ti3k.html.

TI-3500

Priced at $99.95, the TI-3500 offered a wider display than the TI-3000 with 10 digits and two sliding switches to select between CHAIN or CONSTANT calculations and to adjust the position of the decimal point.

Learn more at http://datamath.org/Desktop/ti-3500.htm.

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Judy Novotny

Judy is a computer veteran with 30 years of experience. She has owned everything from a TRS-80, Apple IIe and various Windows-based PCs. She is currently living in her Apple ecosystem at home consisting of an iPhone, iPad, iMac, MacBook, Apple TV, iPod nano and two Time Capsules. She is a fan of all things mobile since she got her first Palm Pilot in 1999. Check out her iPad app, Number Wizard, in the App Store. Follow her on Twitter @junovotech or at Junovo.com.