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Electromechanical stuff. Like old jukeboxes, pinball machines or anything else that required programming before the widespread use of microcontrollers.
Some people have already mentioned stuff akin to this, like the mechanical govenor, or the post abt THIS MUSEUM IS NOT OBSOLETE, but it really deserves its own thread.
Technology Connections on YouTube has made some great videos about devices like that.
I remember getting a hand-me-down digital 'black book' to store phone numbers during the age of the palm pilot. It had a 'dial' button and a speaker on the back. You could pick up the phone, put the speaker against the phone's mouthpiece and it would 'dial' by playing the correct tones. Blew. My. Mind.
