Pictures of Devices in Computing

ABACUS(around 500 BC)


Napier's Bone(1617)

Slide Rule(1620)
 

Pascaline or Pascal's Adding Machine(1642)


Step Reckoner(1670)


Difference Engine(1822)


Analytical Engine(1830)


MARK1


ENIAC or Electronic Numerical Integrator and Computer(1946)
 

UNIVAC 1 or Universal Automatic Computer(1951)