Besides the required tools described above, you are strongly encouraged
to download and install a source code control system, such as the
Concurrent Version System (CVS), to maintain historical
versions of the source files that make up your web application. Besides
the server, you will also need appropriate client
tools to check out source code files, and check in modified versions.
Detailed instructions for installing and using source code control
applications is beyond the scope of this manual. However, CVS server and
client tools for many platforms (along with documentation) can be downloaded
from http://www.cvshome.org.