The Evolution of Word Processing - Pencils to Wikis
Here is a single PowerPoint slide I use in my knowledge management/knowledge transfer training presentations on helping people to understand Wikis.
I have not used any background images in this slide to allow you to easily incorporate it in your own presentations .
Released for use under the following license: http://creativecommons.org/licenses/by-sa/3.0/
Reduced size screenshot of the slide: