Historyx

stingymilitaryΗλεκτρονική - Συσκευές

27 Νοε 2013 (πριν από 3 χρόνια και 6 μήνες)

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History

Computers


Development of Computers


Abacus (500 BC)


Pascaline

(1642)
-

Blaise Pascal



Punch cards (1801)
-

Joseph Jacquard



Difference Engine/Analytical Engine (1822)
-

Charles Babbage



First programmer
-

Ada

Augusta Lovelace



Census Bureau (1890)
-

Herman
Hollerith



ABC by
Atanasoff

& Berry

General Purpose Computers


ENIAC by
Mauchly

& Eckert


First computer based entirely on vacuum
tubes



EDVAC by von
Neumann


Improved
programming
requirements of
ENIAC


Stored program
concept



First Generation


1951


1958


Vacuum tubes


UNIVAC I (1951)


First computer built for a data processing application


Punched cards


Machine language being replaced by assembly
language


FORTRAN

Vacuum Tubes

Second Generation


1959


1963


Transistors


DEC introduced PDP
-
1 (1960)


First minicomputer


IBM began work on System 360 series
(1961)


Magnetic tapes and disks


COBOL, Basic, and PL1

Transistors

Third Generation


1964


1970


Integrated circuits


Circuits reside on a single chip


IBM introduced System 360 series (1964)


RPG and Pascal

Integrated Circuits

Fourth Generation


1971


???


LSI and VLSI


Many circuits on a single chip


Development of microprocessor by Intel (1971)


MITS, Inc.


first commercially successful
microcomputer (1975)


Apple II (1977), Tandy’s TRS
-
80 (1979), IBM PC
(1981)


Ada

LSI

? Next Generation ?

Apple I
1976







$666.66

£
133,250 ($210,000)