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Charlie Stross

Toot a photo of a computer that first arrived in the year of your birth!

(Here's mine: the IBM System/360)

Photograph of the front panel of an IBM System/360 mainframe—an adult person height red box about 1.5 metres deep, with a panel of blinkenlights and rotary dials (and some buttons). A desk sits in front of it, presumably for the operator's teletype printer.
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@cstross

IBM 702: announced 1953, first actual installation 1955.

Memory: 11,000 7-bit "characters", or about 10kb. Most had tube memory, but the last one built (the 14th) had magentic core memory and the previous 13 were retrofitted with core.

CPU: tons of tubes!

3950 additions/subtractions per second; multiplication and division dramatically more slowly.

IBM 702 computer, ca 1955.
Mar 28, 2025, 08:08 PM·Public·Web
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