Bohn Contex-10 Desk Calculator
Sun, 2010-02-07 16:51 — walker
Donor: Anonymous
A simple manual calculator (no circuitry) that was released in 1957. It could only perform the four basic operations: addition, subtraction, multiplication, and division. Addition and subtraction are relatively simple operations on the machine, however, multiplication and division are more complex as they require the user to remember the multiplier and quotient in their head.
References: http://www.oldcalculatormuseum.com/contex.html
