Glossary 127
RFI Radio Frequency Interference
ROM Read-Only Memory
RTC Real-Time Clock
SD Secure Digital
SDRAM Synchronous Dynamic Random Access Memory
SSD Solid State Drive
TFT Thin Film Transistor
USB Universal Serial Bus
URL Uniform Resource Locator
WAN Wide Area Network
www World W ide Web
Term s
The following terms may appear in this User’s Guide.
Aactive-matrix display—A liquid crystal display (LCD) made
from an array of liquid crystal cells using active-matrix
technology. Also known as a “TFT display,” in its
simplest form there is one thin film transistor (TFT) for
each cell. This type of display works well with computers
because of its shallow depth and high-quality color.
Active-matrix displays are viewable from wider angles
than most passive-matrix displays.
adapter—A device that provides a compatible connection
between two units. For example, the computer’s internal
display adapter receives information from the software
and translates it into images on the screen. An adapter
can take a number of forms, from a microprocessor to a
simple connector. An intelligent adapter (one that is
capable of doing some processing) may also be called a
controller.
Alternating Current (AC)—The type of power usually
supplied to residential and commercial wall outlets. AC
reverses its direction at regular intervals. Compare

Direct

Current (DC)

.