Gemini Guidance Computer

Gemini Guidance Computer
Gemini Guidance Computer in National Air and Space Museum
Invented byIBM Federal Systems Division
ManufacturerIBM Federal Systems Division
Introduced1965 (1965)
Discontinued1966 (1966)
TypeAvionics
Guidance Computer
ProcessorDiscrete Components
Frequency7.143 kilohertz clock
Memory39-bit words memory, each composed of three 13-bit syllables, 4,096 words of memory, in a ferrite core array
PortsModular Display Keyboard (MDK), Modular Display Readout (MDR), Attitude Control and Maneuver Electronics (ACME), Inertial Measurement Unit (IMU), Horizon Sensors, Time Reference System (TRS)
Weight58.98 lb (26.75 kg)
Dimensions18.9 in × 14.5 in × 12.75 in (48.0 cm × 36.8 cm × 32.4 cm) (H)×(W)×(D)

The Gemini Guidance Computer (sometimes Gemini Spacecraft On-Board Computer, OBC) was a digital, serial computer designed for Project Gemini, America's second human spaceflight project. The computer, which facilitated the control of mission maneuvers, was designed by the IBM Federal Systems Division.

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