Magic-Brain Calculator Smithsonian Institution

Electronic Calculators—Handheld

OMNIA - calculator

Magic-Brain Calculator Smithsonian Institution

ENIAC - Wikipedia

Index Smithsonian Institution

Gallery: 15 unique analog and mechanical computers from throughout

Unopened package Includes instructions, Calculator and Stylus are both metal

Vintage 1960's Magic Brain Pocket Calculator W/Stylus, Made in Hong Kong

Magic Brain: Last Gasp of the Mechanical Calculator

Sheet, Simplified Instructions Magic-Brain Calculator

Vintage Chadwick Magic Brain Calculator on A La Modern

Unopened package Includes instructions, Calculator and Stylus are both metal

Vintage 1960's Magic Brain Pocket Calculator W/Stylus, Made in