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Store Systems Technical Reference
Glossary
EIA interface. An industry-accepted interface for connecting devices
having voltage-related limits.
element. (1) In a set, an object, entity, or concept having the
properties that define a set. (2) A parameter value in a list of
parameter values.
emulation. (1) The imitation of all or part of one computer system by
another, primarily by hardware, so that the imitating system accepts the
same data, executes the same programs, and achieves the same results as
the imitated computer system. (2) The use of programming techniques and
special machine features to permit a computing system to execute programs
written for another system.
enabled. (1) On a LAN, pertaining to an adapter or device that is active,
operational, and able to receive frames from the network. (2) Pertaining
to a state of a processing unit that allows the occurrence of certain
types of interruptions. (3) Pertaining to the state in which a
transmission control unit or an audio response unit can accept incoming
calls on a line.
end user. The ultimate source or destination of data flowing through an
SNA network. An end user can be an application program or a workstation
operator.
error condition. The condition that results from an attempt to use
instructions or data that are not valid.
error message.
detected.
A message that is issued because an error has been
Ethernet network. A baseband LAN with a bus topology in which messages
are broadcast on a coaxial cable using a carrier sense multiple
access/collision detection (CSMA/CD) transmission method.
European article number (EAN). A number that is assigned to and encoded
on an article of merchandise for scanning in some countries.
evaluation.
Reduction of an expression to a single value.
event. (1) Processing unit containing price changes and item file
updates. All records in an event share common characteristics such as
type of change and event due date. (2) An occurrence of significance to a
task; for example, the completion of an asynchronous operation, such as an
I/O operation.
exception. An abnormal condition such as an I/O error encountered in
processing a data set or a file. See also overflow exception and
underflow exception.
execution. The process of carrying out an instruction or instructions of
a computer program by a computer.
exit. To execute an instruction or statement within a portion of a
program in order to terminate the execution of that portion. Note: Such
portions of programs include loops, routines, subroutines, and modules.
expansion slot. In an IBM Personal Computer, one of several receptacles
in the system board of the system unit or expansion unit into which a user
can install an expansion board such as a memory expansion option.
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fault. An accidental condition that causes a functional unit to fail to
perform its required function.
FCC.
Federal Communications Commission.
feature. A part of an IBM product that may be ordered separately by the
customer.
Feature Expansion. A card that plugs into an IBM 4683 point-of-sale
terminal and allows additional devices to be used.
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
¦ Copyright IBM Corp. 1993
GLOSSARY - 9