ALWAC III-E

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

[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.

[1] An ALWAC III-E was installed at the University of British Columbia in March 1957 and remained in service until October 1961.

An ALWAC III-E was installed by the CIA in September, 1957 in the offices of the Photographic Intelligence Division.

"The arithmetic registers of the ALWAC computer are circulating loops of information one word in length.

Programmer, Irma Lewis, at the console of the Alwac III computer, 1959.
Programmer, Irma Lewis, at the console of the Alwac III computer, 1959.
Finnish physicist Kalervo Vihtori Laurikainen at Turku Computing Center with a Wegematic 1000 computer.