Apache is far and away the most widely used web server platform in the
world, running on Windows NT as well as Unix and other platforms. It
powers about half of the world's existing web sites and is still
increasing market share. Apache also forms the basis of a number of
commercial web servers, such as IBM HTTP Server powered by
Apache and C2Net's Stronghold.

Apache is at the leading edge of web server development with many new
technologies being implemented first. Apache has a flexible
architecture that allows independent developers to add their own
functionality by way of modules, written either in C or, with the
advent of mod_perl, in Perl.

The Apache Pocket Reference, a companion volume to Writing
Apache Modules with Perl and C and Apache: The Definitive
Guide, 2nd Edition, covers Apache 1.3.12. It provides a complete
overview of the command-line options, configuration directives, and
modules, and covers Apache support utilities.
Contents
   Acknowledgments
   Conventions
   Starting and Stopping Apache
   Apache Modules
   Directory Layout
   Support Utilities
   General Configuration
   Request Processing
   Post-Read Request Phase
   URL Translation Phase
   Access Restrictions
   MIME Type Checking Phase
   Content Generation Phase
   Request Logging Phase
   strftime() Time Formats
   Secure Versions of Apache
   CGI Environment Variables
   Index of Apache Directives