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Lot #5423
Apollo Guidance Computer Rope Memory Module (B28)

Raytheon "Rope Memory Module" from the pioneering Apollo Guidance Computer

Estimate: $3000+

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Server Time: 4/10/2026 06:57:26 PM EDT
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Description

Raytheon "Rope Memory Module" from the pioneering Apollo Guidance Computer

Apollo Guidance Computer (AGC) module, 9.75˝ x 1.5˝ x 1.5˝, labeled on the front, "Rope Memory Module B28, NASA No. 1003733-051, Mfg by Raytheon Co., Serial No. Ray 49." In fine condition.

The AGC stored its flight software in 'core rope memory,' a form of read-only memory in which programs were physically woven into magnetic cores, with wires threaded through or around the cores to represent binary data. Each rope module contained a portion of the fixed guidance and navigation programs used by the spacecraft for critical operations such as trajectory calculations, spacecraft control, and lunar landing guidance. A fascinating artifact from the pioneering era of spaceflight and early integrated-circuit computing, representing the remarkable hardware-encoded software that helped make the Apollo lunar missions possible.

Auction Info