A Brief History of Computers

200 BC: Suanpan

2

125 BC: The Antikythera Mechanism

3

1100: The Torquetum

4

1206: Clock Tower

5

1614: Napier’s Bones

6

1642: Pascaline

7

1671: The 'Stepped Reckoner'

8

1823 – Difference Engine

9

1833 – Analytical Engine

10

1890: Punched Card

11

1931: IBM 601

12

1938: Z1

13

1941 – Z3

14

1942: Atanasoff – Berry Computer

15

16

1944: Harvard Mark-I

17

1944: Colossus

1946: ENIAC (Electronic Numerical Integrator And Computer)

5,000 operations per second - 1,000 square feet of floor space

Designed to calculate artillery firing tables for the Army

1948: SSEM or 'Baby'

19

May 6, 1949: EDSAC

20

1951: Whirlwind

21

22

1951: UNIVAC – 1st Commercial Computer

1,905 operations per second

Cost: $750,000 + $185,000 for printer

End of Class!!

23