Analog computer and Computing machine

Analog computer noun - A computer that represents information by variable quantities (e.g., positions or voltages).

Computing machine and analog computer are semantically related. In some cases you can use "Computing machine" instead a noun phrase "Analog computer".

Computing machine noun - A machine for performing calculations automatically.

Analog computer and computing machine are semantically related. Sometimes you can replace phrase "Analog computer" with "Computing machine", this phrases are similar.