Burroughs Series P Adding Machine

This full-keyboard printing adding machine has a steel mechanism and off-white and gray-brown plastic keys. There are ten columns of color-coded digit keys. Right of these is a column of function keys. On the far right are addition and subtraction bars. The ribbon, printing mechanism, and narrow carriage are at the back of the machine, with a serrated edge for tearing the paper tape. The machine has no case. Wiring is present but no cord. The machine has 11 type bars.
A red paper tag attached to the object reads: PATENT DEPT. (/) #345. A metal tag reads: 3531-2. Another metal tag reads: DONATED TO (/) The Smithsonian Institution (/) by (/) Burroughs Corporation.
This object was model #345 in the collection of the Patent Division of Burroughs Corporation.
Currently not on view
Object Name
adding machine
date made
ca 1950
Burroughs Adding Machine Company
Physical Description
plastic (overall material)
metal (overall material)
overall: 20.5 cm x 24 cm x 32.5 cm; 8 1/16 in x 9 7/16 in x 12 25/32 in
place made
United States: Michigan, Detroit
ID Number
catalog number
accession number
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Adding Machines
Data Source
National Museum of American History, Kenneth E. Behring Center


"En 1962, en Mendoza Argentina, siendo técnico de Burroughs reparaba estas maquinas, y fui progresando, en el año 1976 me retiré y ya atendia computadoras B2500."

Add a comment about this object