Good question.
Its a collaborative web site.
Its different from a mailing list in that its persistent and that the "topics" are grouped together on one page rather than as a disjointed series of mail messages, and it makes use of the web's ability to hyperlink, cross refernce and search, which mailing lists, even archived mailing lists, cannot do.
What Makes A Wiki Different From a List or a Blog?
For a start, it archives threads of discussions together and gets rid of many of the annoying features of mailing lists. You can see the whole thread of discussion as well as any links to off-topic matters, side matters and external points, without having to send the whole mass of the thread back and forth time and again. That saves on storage space.
Topics can be refactored and condensed down.
if its "Off Topic" you can create a link and discuss it elsewhere
Being completely web-based it doens't take up much net bandwidth or space on your disk.
You can set things up to notify you when a thread you are interested in has a new entry.
There are much better full-text search and index capabilities
You can embed images
You can upload files, PDFs, etc that others can share.
This isn't like FTP store.
In the topic to which you attach them you can add explanatory text.
You can have more than one attachment per topic
Much of the hypertext cross linking is done automatically
Bill Campbell's CISSPforum FAQ See http://www.eaglesreach.com/cisspforum/faq.html "RTFM" sums it up, but here are some edited highlights: Only send messages ...
For New Users User's Guides How and Why a Wiki Works A Wiki Tuorial The Good Style Guide Text Formatting Shorthand While you don't need to know HTML to use a ...
What's A Wiki? Why Bother? Good question. Its a collaborative web site. Its different from a mailing list in that its persistent and that the "topics" are grouped ...