File types and extensions      File extension DOC is most
commonly associated with documents produced by Microsoft Word,
the popular word processing application bundled with all
versions of Microsoft Office. Many other applications also use
the DOC file extension as a generic term to define a document of
some form, though its use is not widespread. File extension doc
File extension DMG is used by Apple Mac OS X Disk Image files.
Mac OS X natively support DMG files with the bundled Apple Disk
Utility, and can mount and treat them as though they are
physical disk volumes. Mac OS Classic originally used the IMG
file format for the same purposes, though this has now been
superseded by DMG format. File extension dmg The JNLP file
itself is a human readable file containing settings and
configuration information formatted with XML. This information
includes the location of the application's jar file, the name of
the main class and any additional parameters and set up
information the application needs to work correct