[GTALUG] Group knowledge base

How do you or your company maintain group "knowledge base"? I guess, wiki for internal stuffs. I'm using Words/Excel files. A chapter (Word) or worksheet (Excel) for different subject or project. You can insert screenshots, tables, etc. Screenshot of installation or picture of DIP switches is way simpler than trying to explaining it in words. You can cut/paste from original documentation. But, I'm curious what others are using. -- William Park <opengeometry@yahoo.ca>