Computer History Timeline
Source: Freed, Les. The History of Computers, Ziff Davis Press, Emeryville, CA, 1995
1822 "On the Theoretical Principles of the Machinery for Calculating Tables. Charles Babbage
Also from Babbage: Differential Engine - 1832. Weighed 3 tons, 25,000 parts. Followed by his "Analytic
Engine". Never worked.
1740's Jacques de Vaucanson - came up with idea of storing information on punched cards.
1890 Herman Hollerith. Formed the Tabulating Machine Company. Used punched cards for the 1890 census.
1924 IBM formed from the Tabulating Machine Company and 2 other companies
VACUUM TUBE COMPUTERS
1930 Vannevar Bush at MIT. Built the "Differential Analyzer - was 50 ft. long
1943 IBM Mark I at Harvard by Howard Aiken. Was 8 ft tall, 50 feet long, had 1 million parts. It weighed
"several tons", could do a multiply of a 23 digit number in 6 seconds and a division in 12 seconds.
1938-44 Colossus - used by allied forces in Britain to crack German codes. 10 of them were built and deciphered
1946 ENIAC - Weighed 60,000 pounds, took up 1500 sq. ft of floor space and required 5 operators to operate.
The lights of Philidelphia dimmed each time it was turned on. It stayed in service for 10 years.
1951 UNIVAC-1. Delivered to the Census bureau. Stayed in service 12 years.
1952 IBM 701 - 1st computer to use magnetic tape. It had a 1024 Bit memory.
1953 IBM 650 - 1st massed produced computer. IBM sold 2000 of them.
INVENTION OF THE TRANSISTOR - at AT&T by Bardeen, Shockley, and Brittain.
1959 IBM 7090
1964 IBM System 360 - First modular computer.
INVENTION OF THE CIRCUIT BOARD
1960 PDP-1 from Digital Equipment Corp. 1st low priced computer. Cost $125,000 to $250,000
1965-70 PDP-8 and PDP 10
INVENTION OF THE INTEGRATED CIRCUIT
1971 Intel 4004 processor. Had 2000 transistors on a 3x4mm chip. Cost $200 and could do 60,000
1974 Intel 8080. Cost $360 and could do 1 million operations/second
1975 Altair (used the 8080 chip). Had a 256 Byte memory
1976 Apple II. Wozniak and Jobs. Had BASIC as a built in operating system and used color and graphics. Had
a 64 Kbyte memory.
1981 IBM PC. Used the Intel 8088 chip. Cost $2495 and had 16Kbytes
1984 Macintosh by apple computer. 1st popular GUI interface.
1990 MS Windows.
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