00404 Error Code
The computer's other error codes included error 00404, which was shorthand for "IMU orientation unknown". Since the Inertial Measurement Unit device literally told the craft where to go, this has been compared to the HTTP 404 not found or browser navigation error code used on the World Wide Web. However, the later familiar HTTP error code did not originate with the AGC.
Read more about this topic: Apollo Guidance Computer
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