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To: Tony Viola who wrote (98323)	2/5/2000 9:03:00 PM
From: bhagavathi	Respond to of 186894

Tony, RE: 1969 had small and medium scale integration ICs, analog and digital, a lot of them made for the military, and, obviously, the space program. Wonder what they did for software? How complex a calculation they could do with those computers? A lot would have been done by the slide rule i guess? I know ibm was working on their 360 os in early 60s. I guess it was production or test version of it got out in mid to late 60's. I guess fortran was ruling during that time. mula

To: Tony Viola who wrote (98323)	2/5/2000 9:33:00 PM
From: FJB	Read Replies (1) \| Respond to of 186894

Off Topic Computers in Spaceflight hq.nasa.gov

To: Tony Viola who wrote (98323)	2/5/2000 9:41:00 PM
From: steve harris	Read Replies (1) \| Respond to of 186894

fwiw, hq.nasa.gov These aren't the mainframes on the ground though. Computers in Spaceflight The NASA Experience Part I : Manned Spacecraft Computers Introduction to Part One. - Chapter One - - The Gemini Digital Computer: First Machine in Orbit - The Gemini Digital Computer: First Machine in Orbit. Hardware. Software. Crew interfaces to the Gemini digital computer. The impact of the digital computer. - Chapter Two - - Computers On Board The Apollo Spacecraft - The need for an on-board computer. MIT chosen as hardware and software contractor. The Apollo computer systems. Evolution of the hardware: Old technology versus new block I and Block I designs. The Apollo guidance computer: Hardware. The Apollo guidance computer: Software. Using the AGC. The abort guidance system. Lessons. - Chapter Three - - The Skylab Computer System - The Skylab Computer System. Hardware. Software. User Interfaces. The Reactivation Process. Conclusions. - Chapter Four - - Computers in the Space Shuttle Avionics System - Computers in the Space Shuttle Avionics System. Evolution of the shuttle computer system. The DPS hardware configuration. Computer synchronization and redundancy management. Developing software for the space shuttle. Using the Shuttle DPS. The Space shuttle main engine controllers. The future of the shuttle's computers. Conclusion.