Actuator is a device to convert an electrical control signal to a physical action. Actuators may be used for flow-control valves, pumps, positioning drives, motors, switches, relays and meters.

Analog repeater is telecommunications equipment used to boost and clarify analog signals on telephone lines.

A converter that changes real-world analog signals such as light and sound into digital code.

Asynchronous Transfer Mode (ATM) is a global industry standard for broadband communications that uses high-speed switching capabilities to carry two digital signals of varying bandwidth.

Bandwidth is the difference between the lowest and highest frequency components of a signal or device.

Codec is an abbreviation for Coder-Decoder. It's an analog-to-digital (A/D) and digital-to-analog (D/A) converter for translating the signals from the outside world to digital, and back again.

Collect is the act of gathering information in the form of analog or digital input through devices such as scanners, microphones, camcorders, TV cameras, pressure and temperature transducers and keyboards.