National Museum of American History

This paper sheet gives “simplified instructions” for using an adder called the Magic Brain Calculator for addition, description, multiplication, and as an aid in division. It was received with adder 1987.0575.01.Currently not on view

National Museum of American History - Carltonaut's Travel Tips

Smithsonian Institution, National Museum of American History

National Museum of American History

Smithsonian National Museum of American History : Washington DC

National Museum of American History Blog

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National Museum of American History

National Museum of American History Pictures: View Photos & Images

National Museum of American History - Carltonaut's Travel Tips

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National Museum of American History - Wikipedia

Smithsonian National Museum of American History - Cinnabar

Smithsonian National Museum of American History