This is the start of a potential question:
Which Apollo-era contractors are still building aerospace components today?
This list of major Apollo manufacturers is from Chariots for Apollo. Which of them still make aerospace components today?
- AC Delco: inertial measuring unit, gyroscopes
- Aerojet-General: service module engine
- Aeronca: honeycomb panels
(snip) There are 34 total vendors. Some of them are obviously still in the business (e.g. Boeing), some have been bought out, some have gone out of business.
I don't expect a single, comprehensive answer; I expect many answers from many users. It doesn't fit with the SE voting model, but I see the opportunity to draw people to our site and to share people's knowledge more important than rigid devotion to the voting system.
My concern is that the list of 34 vendors is way to long for one question. Some options:
Post the question as is, with 34 vendors in one question.
Reduce to one question with the contractors of the major airframes. The answer would be trivial, as all but Grumman is now part of Boeing, and both are still in the aerospace business.
- Boeing: S-IC first stage
- Douglas Aircraft: S-IVB third stage
- Grumman: lunar module
- North American Aviation (Rockwell): S-II second stage, command module, service module
Reduce the question to just the prime contractors in this map:
Split into four questions (this is my preference):
- Saturn V (with instrument unit and the adapter panels)
- Lunar module
- Service module (with launch escape system)
- Command module
Don't bother with the question.