label -

      In a graphics segment, an identifier of one or more elements that is used when editing the segment.
    LAN -
      Local area network.
    language support procedure -
      A function provided by the Presentation Manager Interface for applications that do not, or cannot (as in the case of COBOL and FORTRAN programs), provide their own dialog or window procedures.
    lazy drag -
      See pickup and drop.
    lazy drag set -
      See pickup set.
    LDT -
      In the OS/2 operating system, Local Descriptor Table.
    LIFO stack -
      A stack from which data is retrieved in last-in, first-out order.
    linear address -
      A unique value that identifies the memory object.
    linked list -
      Synonym for chained list.
    list box -
      In SAA Advanced Common User Access architecture, a control that contains scrollable choices from which a user can select one choice.

      Note: In CUA architecture, this is a programmer term. The end user term is selection list.

    list button -
      A button labeled with an underlined down-arrow that presents a list of valid objects or choices that can be selected for that field.
    list panel -
      A defined panel type that displays a list of items from which users can select one or more choices and then specify one or more actions to work on those choices.
    load time -
      The point in time at which a program module is loaded into main storage for execution.
    load-on-call -
      A function of a linkage editor that allows selected segments of the module to be disk resident while other segments are executing. Disk resident segments are loaded for execution and given control when any entry point that they contain is called.
    local area network (LAN) -
      (1) A computer network located on a user's premises within a limited geographical area. Communication within a local area network is not subject to external regulations; however, communication across the LAN boundary may be subject to some form of regulation. (T)

      Note: A LAN does not use store and forward techniques. (2) A network in which a set of devices are connected to one another for communication and that can be connected to a larger network.

    Local Descriptor Table (LDT) -
      Defines code and data segments specific to a single task.
    lock -
      A serialization mechanism by means of which a resource is restricted for use by the holder of the lock.
    logical storage device -
      A device that the user can map to a physical (actual) device.
    LPT1, LPT2, LPT3 -
      Character-device names reserved for parallel printers 1 through 3.

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