Black and white image of the RCA BIZMAC Clock. In file is a small photocopy cutout with the following text: "BIZMAC Clock. The BIZMAC was the result of an early attempt by RCA to produce a large-scale general-purpose computer for business applications. With its 29,000 tubes and 63,000 diodes, it was certainly one of the largest first generation computers ever built. The machine had an ambitious design that incorporated many features now common in computers, but a series of problems delayed its introduction until the late 1950's. (following text crossed out) By then computers using solid state circuits and ferrite-core memories would make the BIZMAC obsolete. Only a few of the gargantuan machines were ever installed." Verso in pencil is number #590.