Rockwell Model 20R "The Answer" Calculator

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The Rockwell 20R was one of the first Rockwell calculators introduced after Rockwell International's takeover of Sumlock-Anita Electronics in 1973.

The 20R electronic calculator featured memory and percent functions. It also featured:

  • 8 digit LED display
  • Algebraic logic
  • Floating decimal
  • Repeat function
  • Battery operated
  • AC jack
  • Clear entry
  • Full accumulating memory
  • Automatic constants
  • % key
  • Mark-on and discount
Our exhibit has the original box and operators manual.

Manufacturer: Rockwell
Date: 1974

Other Systems Related To Rockwell Model 20R "The Answer" Calculator:

Item Manufacturer Date
Rockwell Electric Printing Calculator 212P Rockwell Unknown
Rockwell 920 Programmable Calculator Rockwell International 1975
Rockwell Model 18R Calculator Rockwell 1975
Rockwell 44RD Calculator Rockwell International 1976

This exhibit has a reference ID of CH31474. Please quote this reference ID in any communication with the Centre for Computing History.

  

Rockwell Model 20R


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