I watched a 1969 film on YouTube about the inner workings of the Apollo Guidance Computer that helped put a man on the moon. The navigation details are fascinating. I had no idea that the astronauts used a sextant to shoot bearings to stars!
Integrated circuits vintage
The film shows logic gates that are packaged in TO cases. (TO cases are small diameter metal cans used to house transistors.) By 1967 these would have been obsolete. In 1967 we were already developing products with readily-available quad NAND gates (using TTL — transistor-transistor logic). These 7400-series parts were packaged in 14-pin plastic DIPs (Dual In-line Packages). The higher spec’d 5400 series were packaged in ceramic DIPs. I’d guess that the Apollo Guidance Computer (AGC) in the film was designed well before that — maybe 1964 or even earlier.
I’m a little confused. The Wikipedia description of the AGC states that it exclusively used Fairchild resistor-transistor logic (RTL) dual NOR gates in a flat-pack. Hmmmm. That’s not what the film shows.
In any case, both the single logic gate in a can and the dual RTL NOR gates in a flat pack would have been obsolete by 1969. I would have thought that NASA projects would have used the latest technologies, not 5 year old technologies. I guess that subsystems within large projects such as Apollo acquire momentum, and once they’ve been proven, the “If it ain’t broke, don’t fix it” motto applies.
It’s an interesting film, regardless.