In computing, a WAR file (short for Web ARchive) may refer to:

• Sun WAR (file format), a JAR file used to distribute a collection of JavaServer Pages, servlets, Java classes, XML files, tag libraries and static Web pages (HTML and related files) that together constitute a Web application.
• KDE WAR (file format), a tarball (tar.gz file) which contains static Web pages (HTML and related files).

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