JOHNNIAC elapsed hour meter panel

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  • Description
Date Introduced
1953 ca.
Photographer
Richards, Mark
Dimensions
11 x 30 1/2 x 11 (HWD) in.
Manufacturer
RAND Corporation
Credit Line
Gift of the RAND Corporation
Copyright Owner
© Mark Richards
Object ID
X1560.98

JOHNNIAC had run for 51,349 hours when it was finally decommissioned in 1966 after 13 years of operation. The “heater voltage” meter is higher because, to avoid failures, the vacuum tubes were left on even when the machine was not used.