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

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National Museum of American History

Smithsonian National Museum of African American History & Culture

Smithsonian National Museum of American History – Adventures of

D.C.'s new African American museum is a bold challenge to

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National Museum of African American History and Culture Is