Welcome to the Planet GIS Documentation Project
The most recent versions of technical documentation describing the use of PlanetGIS software is hosted here in a "Wiki" format. A wiki is a web site which allows people to collaborate on creating documents. All users that have registered on this web site (and logged in) will be able to make changes to these pages or add their own pages. Previous versions of pages are always kept, so it is impossible to loose content.
You can read more about wikis on the best known wiki - Wikipedia - here: http://en.wikipedia.org/wiki/Wiki