4 ms·
Railway signaling goes a lot further back than that. Steel cables connected between a mechanical signal and a lever, including fail-safes should cables break.
by Symbiote 4y ago
Railway signaling goes a lot further back than that.
Steel cables connected between a mechanical signal and a lever, including fail-safes should cables break.
A special baton to carry, only a train carrying a baton is allowed to move.
These are still in use in some places.
- arethuza 4y agoJacquard looms are even older than that. https://en.wikipedia.org/wiki/Jacquard_machine https://en.wikipedia.org/wiki/Jacquard_machine
- JoeAltmaier 4y agoI don't go back that far. My first computer was an Altair 8800.
- arethuza 4y agoI once met a chap who had done programming with a hand drill.... Ancient mainframe controlling a steel plant, booted from a paper tape that had decades before been replaced with a leather strap. He need to alter something in the boot process - so had to resort to a hand drill :-)