Number machines
Subtitle: an introduction to the abacus, slide rule, and pocket calculator
By: Forrest M. Mims, III.
Publisher: McKay
Published: 1977
Place of publication: New York
Language: eng
Number of pages: 54
Subjects: Abacus -- Juvenile literature.; Slide-rule -- Juvenile literature.; Calculators -- Juvenile literature.; Abacus.; Slide rule.; Calculators.
Description: Describes the development of the abacus, slide rule, and calculator and demonstrates their uses.