Toshiba PPM78U05L01E User Manual

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Glossary-12
User’s Manual
PORTÉGÉ M780
printed circuit board (PCB): A hardware component of a processor to 
which integrated circuits and other components are attached. The 
board itself is typically flat and rectangular, and constructed of 
fiberglass, to form the attachment surface.
program: A set of instructions a computer can execute that enables it to 
achieve a desired result. See also application.
prompt: A message the computer provides indicating it is ready for or 
requires information or an action from you.
R
Radio frequency interference (RFI) shield: A metal shield enclosing the 
printed circuit boards of the printer or computer to prevent radio and 
TV interference. All computer equipment generates radio frequency 
signals. The FCC regulates the amount of signals a computing 
device can allow past its shielding. A Class A device is sufficient for 
office use. Class B provides a more stringent classification for home 
equipment use. TOSHIBA portable computers comply with Class B 
computing device regulations.
Random Access Memory (RAM): High speed memory within the 
computer circuitry that can be read or written to.
restart: Resetting a computer without turning it off (also called “warm boot” 
or “soft reset”). See also boot.
RGB: Red, green, and blue. A device that uses three input signals, each 
activating an electron gun for a primary additive color (red, green, 
and blue) or port for using such a device. See also CRT.
RJ45: A modular LAN jack.
ROM: Read Only Memory: A nonvolatile memory chip manufactured to 
contain information that controls the computer’s basic operation. 
You cannot access or change information stored in ROM.
S
SCSI: Small Computer System Interface is an industry standard interface 
for connection of a variety of peripheral devices.
SD/SDHC Card: Secure Digital cards are flash memory widely used in a 
variety of digital devices such as digital cameras and Personal 
Digital Assistants.
serial communications: A communications technique that uses as few as 
two interconnecting wires to send bits one after another.
serial interface: Refer to a type of information exchange that transmits 
information sequentially, one bit at a time.
SIO: Serial Input/Output. The electronic methodology used in serial data 
transmission.