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Apollo Guidance Computer
Apollo Guidance Computer
Apollo Guidance Computer
Apollo Guidance Computer
Apollo Guidance Computer

Apollo Guidance Computer

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• Short-Sleeve Lightweight T-Shirt
• 65% Polyester / 35% Ring-Spun Cotton
• Fabric weight: 4.5 oz (153 g/m2)
• Pre-shrunk
• Shoulder-to-shoulder taping
• Double-stitched sleeves and bottom hem

A shirt that is so awesome it might take you to the moon.

  • Short-Sleeve Lightweight T-Shirt
  • 65% Polyester / 35% Ring-Spun Cotton
  • Fabric weight: 4.5 oz (153 g/m2)
  • Pre-shrunk
  • Shoulder-to-shoulder taping
  • Double-stitched sleeves and bottom hem

The Apollo Guidance Computer (AGC) is the digital computer that helped in the guidance, navigations, and control of the Apollo spacecraft. The AGC uses a DSKY interface that allows astronauts to communicate with the Apollo program. It has indicator lights, a calculator-style keypad, and numeric displays. The AGC was created in 1966 and was crucial to the successful landing on the moon.

The AGC ran on the Apollo program specifically created for the Apollo missions. Of course, the men and women behind creating the program were beyond geniuses. One of the great geniuses was Margaret Hamilton. She led the team that engineered the software of the AGC and conducted rigorous tests to ensure it did not fail.

A very interesting story is when minutes before Apollo 11 landed on the moon when the Apollo software overrode a command to switch the flight’s priority system to a radar system. Somehow, a 1202 alarm was triggered that indicated the system was removing less important tasks. It was the AGC’s way to protect the computer and software. Despite the 1202 alarm, Apollo 11 landed safely on the moon...and the rest was history.

Want to learn more about Margaret Hamilton? Check out her interview last July 2011. You can also check out Hamilton’s picture beside a print-out of her source code and marvel at how long they could’ve taken to write that one out. Want to go down the rabbit hole and geek out on the AGC? Watch this video, this one, and this.

Launched on: March 7, 2020