First Generation: 1944-1959
Characteristics:
(not all first generation computers had all these characteristics)
-vacuum tube based
-punched tape input or output
-about 1,000 circuits per cubic foot
Examples:
-Harvard Mark I (electromechanical)
-Whirlwind
-ENIAC
-EDSAC
-UNIVAC I, UNIVAC II, UNIVAC 1101
-RCA BIZMAC
-NCR CRC 102A, NCR CRC 102D
-Honeywell Datamatic 1000
-Burroughs E101, Burroughs 220
-IBM models 604, 650 (drum memory), 701, 702, 704, 705, 709
Second Generation: 1960-1964
Characteristics:
-used transistors
-about 100,000 circuits per foot
Examples:
-UNIVAC 1107, UNIVAC III
-RCA 501
-Philco Transact S-2000
-NCR 300 series
-IBM 7030 Stretch
-IBM 7070, 7080, 7090, 1400 series, 1600 series
-Honeywell 800, 400 series
-General Electric GE 635, 645, GE 200
-Control Data Corp. CDC 1604, 3600, 160A
-LARC
-Burroughs B5000, 200 series
Third Generation: 1964-1975
Characteristics:
-large scale integrated circuits
-10 million circuits per square foot
Examples:
-Burroughs 6700
-Control Data 3300, 6600, 7600
-Honeywell 200
-IBM System/360, System 3, System 7
-NCR Century Series
-RCA Spectra 70 series
-UNIVAC 9000 series
-General Electric GE 600 series, GE 235
Fourth Generation: 1975-Current
Characteristics:
-very large scale integration
-continued miniaturization
-billions of circuits per cubic foot
Examples:
-IBM System 3090, IBM RISC 6000, IBM RT
-ILLIAC IV
-Cray 2 XMP
-HP 9000
Fifth Generation: Current and Future
Characteristics:
Combinations of some or all of the following technologies:
-extremely large scale integration
-parallel processing
-high speed logic and memory chips
-high performance, micro-miniaturization
-voice/data integration; knowledge-based platforms
-artificial intelligence, expert systems
-virtual reality generation
-satellite links
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