chm

from The Free On-line Dictionary of Computing (8 July 2008)
Compiled HTML
chm

   <filename extension> A {Microsoft} file format for
   distributing a collection of {HTML} files, along with their
   associated images, sounds, etc., as a single compressed
   archive file.

   Microsoft use this format for {Windows} {HTML Help} files.
   Most chms include a project (.hhp) file listing the included
   files and basic settings, a contents (.hhc) file, an index
   (.hhk) file, html files, and, optionally, image files.

   Users view chms with hh.exe, the HTML Help viewer installed
   with {Internet Explorer}.

   Filename extension: .chm.

   
(http://msdn.microsoft.com/library/en-us/htmlhelp/html/vsconHH1Start.asp).

   (2003-05-17)