• A physical unit or mechanism which performs a specific function or serves for a particular purpose. A device may be electrical, mechanical, electromechanical, and so on, and examples include, resistors, cable connectors, transistors, ICs, disk drives, and computers.
  • A hardware component or subsystem in a computer, such as a disk drive, keyboard, or port.
  • An electronic unit which incorporates one or more active components. For instance, a transistor, or an IC.
  • An active component, such as a transistor or an operational amplifier, which can not be subdivided without disabling its function.

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