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TECRA M2 5
Glossary
disk drive: The device that randomly accesses information on a disk and
copies it to the computer’s memory. It also writes data from memory
to the disk. To accomplish these tasks, the unit physically rotates the
disk at high speed past a read-write head.
disk storage: Storing data on magnetic disk. Data is arranged on concentric
tracks much like a phonograph record.
diskette: A removable disk that stores magnetically encoded data. Also
called a floppy disk.
display: A CRT, LCD, or other image producing device used to view
computer output.
documentation: The set of manuals and/or other instructions written for
the users of a computer system or application. Computer system
documentation typically includes procedural and tutorial information
as well as system functions.
DOS: Disk Operating System. See operating system.
driver: A software program, generally part of the operating system, that
controls a specific piece of hardware (frequently a peripheral device
such as a printer or mouse).
Dual Pointing Device: Pointing device consisting of AccuPoint and Touch
Pad. Both of these device can function together or separately. See
AccuPoint and Touch Pad.
DVD-RAM: A Digital Versatile Disc Random Access Memory is a high-
capacity, high performance disc that lets you store large volumes of
data. The DVD-ROM drive uses a laser to read data from the disc.
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.
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.