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6
Glossary
A
AC — alternating current — The form of electricity that powers your computer when you plug
the AC adapter power cable in to an electrical outlet.
D
DisplayPort — An interface standard of the Video Electronics Standards Association (VESA)
used for digital displays.
docking device — Provides port replication, cable management, and security features to adapt
your laptop to a desktop workspace.
I
I/O — input/output — An operation or device that enters and extracts data from your
computer. Keyboards and printers are I/O devices.
S
serial connector — An I/O port which a connected device sends data one bit at a time, and
ports are identified as COM (communications) ports.
U
USB — universal serial bus — A hardware interface for a low-speed device such as
a USB-compatible keyboard, mouse, joystick, scanner, set of speakers, printer, broadband
devices (DSL and cable modems), imaging devices, or storage devices. Devices are plugged
directly in to a 4-pin socket on your computer or in to a multi-port hub that plugs in to your
computer. USB devices can be connected and disconnected while the computer is turned on,
and they can also be daisy-chained together.
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