EBCDIC -
Extended binary-coded decimal interchange
code. A coded character set consisting of 8-bit coded characters (9 bits
including parity check), used for information interchange among data processing
systems, data communications systems, and associated equipment.
edge-triggered
-
Pertaining to an event semaphore that is posted
then reset before a waiting thread gets a chance to run. The semaphore is
considered to be posted for the rest of that thread's waiting period; the
thread does not have to wait for the semaphore to be posted again.
EGA
-
Extended graphics adapter.
element
-
An entry in a graphics segment that comprises
one or more graphics orders and that is addressed by the element pointer.
EMS -
Expanded Memory
Specification.
encapsulation -
Hiding
an object's implementation, that is, its private, internal data and methods.
Private variables and methods are accessible only to the object that contains
them.
entry field -
In
SAA Common User Access architecture, an area where a user types information.
Its boundaries are usually indicated. See also selection field.
entry
panel -
A defined panel type containing one or
more entry fields and protected information such as headings, prompts, and
explanatory text.
entry-field control -
The
component of a user interface that provides the means by which the application
receives data entered by the user in an entry field. When it has the input
focus, the entry field displays a flashing pointer at the position where
the next typed character will go.
environment
segment -
The list of environment variables and
their values for a process.
environment strings
-
ASCII text strings that define the value of
environment variables.
environment variables
-
Variables that describe the execution environment
of a process. These variables are named by the operating system or by the
application. Environment variables named by the operating system are PATH,
DPATH, INCLUDE, INIT, LIB, PROMPT, and TEMP. The values of environment variables
are defined by the user in the CONFIG.SYS file, or by using the SET command
at the OS/2 command prompt.
error message
-
An indication that an error has been detected. (A)
event semaphore -
A
semaphore that enables a thread to signal a waiting thread or threads that
an event has occurred or that a task has been completed. The waiting threads
can then perform an action that is dependent on the completion of the signaled
event.
exception -
An
abnormal condition such as an I/O error encountered in processing a data
set or a file.
exclusive system semaphore
-
A system semaphore that can be modified only by
threads within the same process.
executable file
-
(1) A file that contains programs or commands
that perform operations or actions to be taken. (2) A collection of related
data records that execute programs.
exit
-
To execute an instruction within a portion of a
computer program in order to terminate the execution of that portion. Such
portions of computer programs include loops, subroutines, modules, and so
on. (T ) Repeatedexitrequestsreturntheusertothepointfromwhichallfunctionsprovidedtothesystemareaccessible
.Contrastwithcancel .
expandedmemoryspecification(
EMS ) -
EnablesDOSapplicationstoaccessmemoryabovethe1MBrealmodeaddressinglimit
.
extendedattribute -
Anadditionalpieceofinformationaboutafileobject
,suchasitsdataformatorcategory .Itconsistsofanameandavalue .Afileobjectmayhavemorethanoneextendedattributeassociatedwithit
.
extendedhelp -
InSAACommonUserAccessarchitecture
,ahelpactionthatprovidesinformationaboutthecontentsoftheapplicationwindowfromwhichauserrequestedhelp
.Contrastwithcontextualhelp .
extended
- choiceselection -
Amodethatallowstheusertoselectmorethanoneitemfromawindow
.Notallwindowsallowextendedchoiceselection .Contrastwithmultiple - choiceselection
.
extent -
Continuousspaceonadiskordiskettethatisoccupiedbyorreservedforaparticulardataset
,dataspace ,orfile .
externallink -
InInformationPresentationFacility
,alinkthatconnectsexternalonlinedocumentfiles .
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