"Computer" Pen with Multiplication Tables

This 6" gray plastic ballpoint click pen has eleven round holes on the side that reveal a rotating multiplication table. The first hole shows a number between 1 and 10. The other holes show multiples of that number from 1 to 10. Clicking the pen rotates the table. The pen's metal pocket clip is marked: MOD (/) DEP (/) COMPUTER. This pen was found in the Museum collections in the 1980s.
Currently not on view
Object Name
pen with tables
date made
late 20th century
Physical Description
plastic (overall material)
metal (overall material)
overall: 15.1 cm x 1.5 cm x 1.2 cm; 5 15/16 in x 19/32 in x 15/32 in
place made
United States
ID Number
catalog number
nonaccession number
Pens and Pencils
Science & Mathematics
writing implements
Table, Mathematical
See more items in
Medicine and Science: Mathematics
Pens and Pencils
Data Source
National Museum of American History, Kenneth E. Behring Center
Additional Media

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