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1. One who computes corrections for geophysical data; a computor. 2. A machine capable of accepting information, applying prescribed processes to the data (a sequence of arithmetic and logical operations as requested by program instructions), and supplying the results to some output device. A simple computer program is shown in Figure F-14. 3. An analog computer uses a physical analogy of position, electric current, flow, temperature, etc. to solve relationships. 4. A digital computer applies numerical processes to sets of discrete numbers.