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User’s Manual Glossary-7
PORTÉGÉ M750
DVD-ROM: A Digital Versatile Disc-Read Only Memory is a high capacity,
high performance disc suitable for play back of video and other
high-density files. The DVD-ROM drive uses a laser to read data
from the disc.
DVD-RW (+RW, -RW): A Digital Versatile Disc-ReWritable disc can be
rewritten many times.
DVD+R (Double Layer): A disc having two layers on one side with the
DVD+R storage capacity about 1.8 times larger than before. The
DVD-RW drive uses a laser to read data from the disc.
E
echo: To send back a reflection of the transmitted data to the sending
device. You can display the information on the screen, or output it to
the printer, or both. When a computer receives back data it
transmitted to a CRT (or other peripheral device) and then
retransmits the data to printer, the printer is said to echo the CRT.
erase: See delete.
escape: 1) A code (ASCII code 27), signaling the computer that what
follows are commands; used with peripheral devices such as
printers and modems.
2) A means of aborting the task currently in progress.
escape guard time: A time before and after an escape code is sent to the
modem which distinguishes between escapes that are part of the
transmitted data, and escapes that are intended as a command to
the modem.
execute: To interpret and execute an instruction.
Extended Capability Port: An industry standard that provides a data
buffer, switchable forward and reverse data transmission, and run
length encoding (RLE) support.
F
fast infrared: An industry standard that enables cableless infrared serial
data transfer at speeds of up to 4 Mbps.
file: A collection of related information; a file can contain data, programs, or
both.
fingerprint sensor: The fingerprint sensor compares and analyzes the
unique characteristics in a fingerprint.
firmware: A set of instructions built into the hardware which controls and
directs a microprocessor’s activities.
floppy diskette: A removable disk that stores magnetically encoded data.