Burroughs Calculator

This full-keyboard printing manual machine has a metal case painted black with a green keyboard. It has nine columns of black and white plastic keys, with nine keys in each column. The odd-numbered keys are concave and the even-numbered keys are flat. Complementary digits are indicated. Ten windows at the front show the sum of numbers entered. A crank at the left zeros the digits in these windows. A single key in the upper left corner controls the numeral wheel seen through the tenth window.
The machine is marked on the front, underlined: Burroughs Calculator. The serial number, on a plate on the bottom, is: 5-660768. It is marked on the back: Burroughs (/) THIS MACHINE PROTECTED BY U.S. AND FOREIGN PATENTS.
Burroughs Adding Machine Company introduced the Burroughs Calculator in about 1911 to compete with the Comptometer. It sold as the Burroughs Class 5 from 1918.
Compare MA.308344 and 1986.3039.01..
American Digest of Business Machines, 1924, pp. 70, 71. This suggests that the machine is a Burroughs model 5205.
Currently not on view
date made
Burroughs Adding Machine Company
place made
United States: Michigan, Detroit
Physical Description
plastic (overall material)
metal (overall material)
rubber (overall material)
overall: 13.7 cm x 24.8 cm x 30.2 cm; 5 13/32 in x 9 3/4 in x 11 7/8 in
ID Number
accession number
catalog number
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
Data Source
National Museum of American History


Add a comment about this object