IBM Once Made A Computer With An Oil Pressure Warning Light

oil-sm

As a computer history buff, I love finding an obscure bit of tech trivia, but this one is really obscure. I recently heard about the IBM 7094’s Oil Pressure Warning light on a YouTube video, and further research provided very little additional information. The oil light was needed because the computer’s core memory was oil cooled. This main frame cost about $3 million, in 1960’s dollars.

The YouTube video is a 1993 episode of Computer Chronicles. The episode is Computer Bowl V, a trivia game that was featured annually on Computer Chronicles. Watch a young Bill Gates read the question about the IBM 7094 HERE. This page mentions the oil cooled core memory on the IBM 7094.

If anyone has more info about the IBM 7094 or oil cooled computers, please post a comment.

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