Burroughs Model 9 Adding Machine

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This full-keyboard manually operated printing adding machine has a metal frame painted black, a metal mechanism and handle, a green felt keyboard, and a glass front. There are six columns of number keys, with nine keys in each column. Some plastic key covers are missing. There are non-add, subtotal, and total keys. The sum appears on number wheels visible through the glass front of the machine and prints on a 2-1/2 inch paper tape at the back which is not visible. The machine is marked on the front: BURROUGHS (/) DETROIT, MICHIGAN. It is also marked there: No.6-157907.
Alfred Harrell, the donor of the machine, was a Smithsonian photographer.
Currently not on view
date made
Burroughs Adding Machine Company
place made
United States: Michigan, Detroit
Physical Description
plastic (overall material)
metal (overall material)
wood (overall material)
glass (overall material)
overall: 31.5 cm x 23.5 cm x 39 cm; 12 13/32 in x 9 1/4 in x 15 11/32 in
ID Number
accession number
catalog number
Credit Line
Gift of Al Harrell
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Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
Data Source
National Museum of American History