JEC (Japanese Electrotechnical Committee) - A regional standards group.

JIC (Joint International Congress) - an international standards group that focuses on electrical standards. They drafted the relay logic standards.

JIT (Just in Time) - a philosophy when setting up and operating a manufacturing system such that materials required arrive at the worksite just in time to be used. This cuts work in process, storage space, and a number of other logistical problems, but requires very dependable supplies and methods.

jog - a mode where a motor will be advanced while a button is held, but not latched on. It is often used for clearing jams, and loading new material.

jump - a forced branch in a program

jumper - a short wire, or connector to make a permanent setting of hardware parameters.

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