A circuit board that enhances the functions of a component of a system unit and/or provides connections to peripheral devices.

A device that connects to the system
unit and is controlled by a processor in a computer.

modem, printer, scanner, keyboard, video camera, microphone or speakers.

To connect to Bluetooth devices such as Bluetooth mouse.

To connect musical instruments and similar devices such as electronic guitar or MIDI keyboard through a MIDI connector to a computer

Allows a computer to send and receive data through telephone or cable lines.

To connect to other computers and peripherals via a network cable.

Provides enhanced graphics capabilities, such as accelerated processing or the ability to connect a second monitor.

Connects to a digital video camera, television or DVD player and convert the analog signals into digital form and compresses the data.