Yours, Etc.: Origins and Uses of 8 Sign-Offs
1909, agent noun in Latin form from process (v.). Data processor is from 1957; word processor is from 1973; food processor in the kitchen appliance sense also is from 1973.
A part of a computer, such as the central processing unit, that performs calculations or other manipulations of data.
A program that translates another program into a form acceptable by the computer being used.