What’s Wrong with PowerPoint as a Document Authoring Tool?
http://brain.brainery.net/mcblog/?p=551

Cuppan, Gregory P.
Brainery.net
2009

Abstract:

It is our position that use of PowerPoint for document planning negatively impacts all potential collaborative authoring and review outcomes. Though PowerPoint is commonly used because it is a familiar tool, it is not the most effective tool for managing knowledge either intellectually or financially.