00:45
Mechanical Calculator approximating Pi | RC Allen Model 35
00:21
Mechanical Calculator approximating Pi | Friden STW-10
00:15
Automatic division on a Monroe mechanical calculator
03:39
Seattle World's Fair July 19, 1962
00:40
What happens when you divide by zero on a mechanical calculator?
00:31
Friden STW-10 Plays the Friden March
X
About
Tags