Английская Википедия:ALWAC III-E

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Programmer, Irma Lewis, at the console of the Alwac III computer, 1959.
Programmer, Irma Lewis, at the console of the Alwac III computer, 1959.

The ALWAC III-E was an early commercial vacuum-tube computer employing a rotating magnetic drum main storage unit,[1] operational in 1955. It weighed about Шаблон:Convert.[2]

The invention of the ALWAC III-E is attributed to Axel Wenner-Gren,[3] and the name is derived from Axel Leonard Wenner-Gren Automatic Computer,[4] letter E stands for the E-register (index register).[5][6] The ALWAC III-E contained 132[3]–275[1] vacuum tubes, 5000[3]–5400[1] silicon diodes, and cost $60,000[1]–$80,000.[3][4] Word size was 32 bits + sign + recoverable overflow bit.[3]

Instruction execution times (including average memory access times) were 5.25–5.75 milliseconds for addition and subtraction, and 21.25 ms for multiplication and division.[1]

An ALWAC III-E was installed at the University of British Columbia in March 1957 and remained in service until October 1961. Others were installed at Oregon State University (then College)[4] and Loyola Marymount University (then Loyola University of Los Angeles). An ALWAC III-E was installed by the CIA in September, 1957 in the offices of the Photographic Intelligence Division. Located at Fifth and K streets NW. and given the name Project Automat, the ALWAC was used to analyze pictures taken by U-2 spy planes.

Memory

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Wegematic 1000

Файл:K-V-Laurikainen-1961.jpg
Finnish physicist Kalervo Vihtori Laurikainen at Turku Computing Center with a Wegematic 1000 computer.

In 1960 Wenner-Gren Centre Foundation donated a Wegematic 1000 (based on ALWAC III-E) computer to the University of Turku in Turku, Finland.[7][8]

Further reading

References

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External links


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