No matter where you are on the organizational ladder, the odds are high that you've delivered a high-stakes presentation to your peers, your boss, your customers, or the general public. Presentation software is one of the few tools that requires professionals to think visually on an almost daily basis. But unlike verbal skills, effective visual expression is not easy, natural, or actively taught in schools or business training programs. slide: ology fills that void.

Written by Nancy Duarte, President and CEO of Duarte Design, the firm that created the presentation for Al...