Multi-User Forum Software

• Doing multi-user forums is part of some websites for sure.
• It involves programming and databases.
  

For a Discussion of Some of the Availabile Software Check out

http://en.wikipedia.org/wiki/Comparison_of_Internet_forum_software

For a description of PHP based forum software: http://en.wikipedia.org/wiki/Comparison_of_Internet_forum_software_%28PHP%29