CHM Revolution

Date

1963-05

Credit Line

Courtesy of the Vintage Calculators Web Museum

Copyright Owner

© Sumlock Comptometer, Ltd.

Keywords

Advertising; Vacuum tube; Comptometer; Bell Punch/Sumlock; Mechanical calculation; Electronic calculation; ANITA

Object ID

500004265

The first commercial electronic calculator was developed by a British firm related to Dorr E. Felt, who patented the Comptometer in 1887.