Re: When did PCB tracks become 'traces'?
In the world of computers [particularly IBM] a printed-circuit-board was often described as a "Planar board" - inevitably shortened to PB.
In the IBM world a PB is often a FRU [Field-Replaceable Unit] but some of them were specially built/populated as part of a RPQ [Request for Price Quotation] and in those cases you generally needed to RMA [Return for Maintenance Authorisation] it via your SE [Systems Engineer].
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