The correct answer to this question is analog. The first credit of creating a speedometer goes to engineer Charles Babbage. Speedometers were patened by Otto Schultze in 1902 and they are used to measure the speed of a vehicle. They also display the speed that was measured.
They use a cable, which rotates, and is started by the vehicle's transmission output. Speedometers are mainly known for being in cars and motorcycles. In a computer, the pulses of the speed are converted. Those speeds are then displayed on an analog, digital display, which is electronically controlled. Analog speedometers are also used in bicycles.
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