This is documentation for Mathematica 3, which was
based on an earlier version of the Wolfram Language.
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 Documentation / Mathematica / The Mathematica Book / Reference Guide / Installation and Organization of System Files  /

A.8.7 Documentation Files

Typical subdirectories of the Documentation directory.

All the elements of the Documentation directory can be accessed through the help browser in the front end. BrowserCategories files in each subdirectory set up the categories used in the help browser. BrowserIndex files provide data for the master index.
Note that the complete Documentation directory is over 50 megabytes in size. Any parts that are not installed will be indicated as unavailable in the help browser.