(1) See domain extension.
(2) A program module that adds functionality to an application or system program. For example, program modules that add capabilities to the Firefox browser are actually called "extensions" (see Firefox extension). The same type of add-on module in the Photoshop image editor is called a "plug-in" (see Photoshop plug-in).
Executable modules that enhance the Mac operating system are called "extensions," while enhancements to the Windows OS are called "dynamic link libraries" (see DLL).
(2) A program module that adds functionality to an application or system program. For example, program modules that add capabilities to the Firefox browser are actually called "extensions" (see Firefox extension). The same type of add-on module in the Photoshop image editor is called a "plug-in" (see Photoshop plug-in).
Executable modules that enhance the Mac operating system are called "extensions," while enhancements to the Windows OS are called "dynamic link libraries" (see DLL).
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2008 The Computer Language Company Inc. All rights reserved. |
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