TI-20 Calculator

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The TI-20 repeated an approach "invented" two years ago. Just like the lean TI-15 based on a fully loaded TI-30, this rare TI-20 is based on the TI-38.

Date of introduction: 1979
Display technology: LCD
New price: $33
Display size: 8 (5 + 2)
Size: 5.3" x 2.9" x 0.35" 134 x 74 x 9 mm3
Weight: 2.9 ounces, 82 grams
Batteries: 2*LR43
Integrated circuits: TP0326

Our calculator (reference 47-60-RC1) was very kindly donated by Francis Hookham

Manufacturer: TI
Date: 1979

Other Systems Related To TI-20 Calculator:

Item Manufacturer Date
Otis King Cylindrical Slide Rule Model L Otis King 1921
Olivetti Elettrosumma 22 Olivetti 1958
Otis King Cylindrical Slide Rule Model K Otis King 1960
Olivetti Summa Prima 20 (pre-decimal) Olivetti 1961
British Thornton PIC No. 271 Log Log Slide Rule British Thornton 1963
British Thornton AD 150 Advanced Slide Rule British Thornton 1965
Olivetti Summa Prima 20 Olivetti 1966
Olivetti Summa Quanta 20 Olivetti 1972
Rockwell 920 Programmable Calculator Rockwell International 1975
Novus 4510 Mathematician National Semiconductor 1975
Rockwell 44RD Calculator Rockwell International 1976
TI Dataman Calculator TI 1977
Citizen 121F Desktop Electronic Calculator Citizen 1977
Kosmos 1 Biorhythm Calculator Kosmos International Ltd. March 1977
TI Programmer TI August 1977
TI-25 Scientific Calculator TI 1978
TI-1070 Calculator TI 1978
TI Little Professor (LED) TI 1978
TI LETTERlogic TI 1980
TI-30 LCD scientific calculator TI 1980
Olivetti Logos 9 Calculator Olivetti 1980
TI LCD Programmer TI 1982
Tandy EC-306 Electronic Chequebook Calculator Tandy Corporation 1982
TI Little Professor TI 1985

This exhibit has a reference ID of CH30290. Please quote this reference ID in any communication with the Centre for Computing History.

 

TI-20 Calculator


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