A simplified circuit that implements the NOR logic gate ... Eventually, silicon arrived, and vacuum tube logic was replaced with diode and transistor logic. This represented a dramatic increase ...

Philco is expected to be in production shortly on preliminary transistor-diode “logic pacs.” Sperry Semiconductor Div. is in pilot production on Semi-Net NOR circuits in TO-5 cases.

This approach was used with the Apollo Guidance Computer, which was built using discrete 3-input RTL-based NOR gates. The competing diode-transistor logic (DTL) circuit technology had the ...