Not necessarily, in the audio field for example anything with signal on it not just 12V, 24V, 48V or 240V tended to be a socket where possible. And not just for personal safety, prevented someone introducing hum or buzz by accidentally touching a high impedance signal source for example. Even things with millivolts of audio on them would tend to end in a socket.It used to be fairly simple with both computers and audio equipment -You mean mains volts. Low voltage seems to have settled on centre +ve.
if there were volts present, it would be the version you couldn't touch
(usually a socket, or a plug with well shrouded pins), but it's never
quite that simple these days.
It wasn't in the past.
Tony
It probably wasn't the same in the field of computers, it was probably just a case of whatever was used first, others had to follow.
-- Dilwyn Jones
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