[Amendment10]

"The Apollo guidance computer that took early astronauts to the moon, ..."

As a side note, I had read where the electronics systems in early NASA rockets used vacuum tubes, corrections welcome. This was noted because blastoff acceleration was claimed to pull the tubes out of their sockets enough to break connections.

[AFreeBird]

Tubes would have sucked too much power. They used primitive ( by our standards) IC’s.