Appendix A, gives URLs for representative source code control systems, some commercial and others freely available. And many more products are availablelook for pointers to the configuration management FAQ.
Orthogonality
The Power of Plain Text
It's All Writing
Even if you are not able to use an SCCS at work, install RCS or CVS on a personal system. Use it to manage your pet projects, documents you write, and (possibly) configuration changes applied to the computer system itself.
Take a look at some of the Open Source projects for which publicly accessible archives are available on the Web (such as Mozilla [URL 51], KDE [URL 54], and the Gimp [URL 55]). How do you get updates of the source? How do you make changesdoes the project regulate access or arbitrate the inclusion of changes?