Burroughs Simplex P601

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This full-keyboard printing adding machine has a gray metal case and the following columns of square tan and brown keys starting from the left:
1. column of 12 month keys
2. two columns of number keys, ranging from 1 to 9
3. column of keys with abbreviated financial terms
4. nine columns of number keys, each column ranging from 1 to 9.
5. two columns of function keys.
The carriage and electrical cord are missing. The 14 type bars include one for months, two for digits, one for the type of transaction, nine for the result, and one for special characters (indicating sum, subtotal, etc.)
A red tag attached to the object reads: PATENT DEPT. (/) #263. The machine is marked across the front above the keyboard: Burroughs. It is marked on the bottom: A7075. It is marked on the back on the inside of the case: 397.
This object was model #263 in the collection of the Patent Division of Burroughs Corporation.
Currently not on view
date made
Burroughs Adding Machine Company
place made
United States: Michigan, Detroit
Physical Description
plastic (overall material)
metal (overall material)
paper (overall material)
overall: 23.3 cm x 31 cm x 46 cm; 9 3/16 in x 12 7/32 in x 18 1/8 in
ID Number
catalog number
accession number
Credit Line
Gift of Burroughs Corporation
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
Data Source
National Museum of American History


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