Table of Contents
Advertisement
dump. (1) To record, at a particular instant, the
contents of all or part of one storage device in another
storage device. Dumping is usually for the purpose of
debugging. (T) (2) Data that has been dumped. (T)
DVD-ROM. Digital-video-disk read-only memory.
E
error message. A message that is issued because an
error has been detected.
F
FCC. See Federal Communications Commission.
feature. A part of an IBM product that may be ordered
separately by the customer.
Federal Communications Commission (FCC). A
board of commissioners appointed by the President
under the Communications Act of 1934, having the
power to regulate all interstate and foreign
communications by wire and radio originating in the
United States.
field. On a data medium or a storage medium, a
specified area used for a particular category of data; for
example, a group of character positions used to enter or
display wage rates on a panel. (T)
file. A named set of records stored or processed as a
unit. (T) For example, an invoice may form a record and
the complete set of such records may form a file. See
also data set.
flash memory. A data-storage device that is
programmable, erasable, and does not require
continuous power. The chief benefit of flash memory
over other programmable and erasable data storage
devices is that it can be reprogrammed wihtout being
removed from the circuit board.
formatted diskette. A diskette on which track and
sector control information has been written and that can
be used by the computer to store data. Note: A diskette
must be formatted before it can receive data.
frame . (1) The unit of transmission in some LANs,
including the IBM Token-Ring Network and the IBM PC
Network. It includes delimiters, control characters,
information, and checking characters. On a token-ring
network, a frame is created from a token when the
token has data appended to it. On a token-bus network
(IBM PC Network), all frames including the token frame
contain a preamble, start delimiter, control address,
optional data and checking characters, end delimiter,
and are followed by a minimum silence period. (2) A
housing for machine elements. (3) In synchronous data
link control (SDLC), the vehicle for every command,
All manuals and user guides at all-guides.com
every response, and all information that is transmitted
using SDLC procedures. Each frame begins and ends
with a flag.
function. (1) A specific purpose of an entity, or its
characteristic action. (A) (2) In data communications, a
machine action such as a carriage return or line feed.
(A)
H
hard-disk drive. In a personal computer system unit,
a disk storage device that reads and writes on rigid
magnetic disks. It is faster and has a larger storage
capacity than a diskette and is permanently installed.
Synonymous with fixed disk.
HID. See human interface devices.
hot pluggable. Refers to a hardware component that
can be installed or removed without disturbing the
operation of any other resource that is not connected to,
or dependent on, this component.
human interface devices (HID). Devices which allow
humans to interact and communicate with a computer.
Examples are a keyboard or a mouse.
hot plugging. Process of installing connections to the
serial bus while the system is running and without
powering down.
hot unplugging. Process of removing connections
from the serial bus while the system is running and
without powering down.
hypertext. (1) A method of presenting text in discrete
units, or nodes, that are connected by links for
navigation. (2) Text designed to be read or accessed in
a nonlinear manner using nodes that are connected by
links for navigation.
I
I/O. See input/output.
I/O device. A device in a data processing system by
means of which data can be entered into the system,
received from the system, or both. (I) (A)
IBM Disk Operating System (DOS) . A disk operating
system based on MS-DOS that operates with all
IBM-compatible personal computers.
IEEE. Institute of Electrical and Electronics Engineers.
input/output (I/O). (1) Pertaining to a device whose
parts can perform an input process and an output
process at the same time. (I) (2) Pertaining to a
functional unit or channel involved in an input process,
output process, or both, concurrently or not, and to the
data involved in such a process.
79
Glossary
Advertisement
Table of Contents
