Front

A signal that is continuous and changes smoothly over a range

Back

analog signal

Front

Signal of discrete states: high/low, on/off, 1/0.

Back

digital signal

Front

Something (usually a machine) with input, process, output, and sometimes feedback.

Back

technological system

Front

Control system with no output-input comparison or sensors.

Back

open loop system

Front

System using output feedback to control input; includes at least one sensor.

Back

closed loop system

Front

Info from a sensor (light, sound, motion) that alters program behavior.

Back

feedback

Front

Device responding to a physical stimulus (e.g., light) and transmitting an impulse.

Back

sensor

Front

An electronic device for storing and processing data according to program instructions.

Back

computer

Front

Collection of physical parts of a computer system.

Back

hardware

Front

Programs and operating info used by a computer.

Back

software