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NSSC-1
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<p>The NASA Standard Spacecraft Computer-1 (NSSC-1) is a <a href="/facts/Computer/SQe1aK05">computer</a> developed as a standard component for the <a href="/facts/MultiMission_Modular_Spacecraft/IglYwQmV">MultiMission Modular Spacecraft</a> at the <a href="/facts/Goddard_Space_Flight_Center/WfoEKknM">Goddard Space Flight Center</a> (GSFC) in 1974. The basic <a href="/facts/Spacecraft/YQqQaUw0">spacecraft</a> was built of standardized components and modules, for cost reduction. The computer had 18 bit wide <a href="/facts/Core_memory/4TFIXSNd">core memory</a> or <a href="/facts/Plated_wire_memory/PDR3ag5h">plated wire memory</a>; up to 64 k. 18 bits was chosen because it gave more accuracy (x4) for data over a 16 bit machine. <a href="/facts/Floating_point/eIckahxe">Floating point</a> arithmetic was not supported. </p>