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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