Book excerpt: Note: This book is available in several languages: Brazilian Portuguese, English, Spanish, French. This is the official Open Group Pocket Guide for TOGAF Version 9.1 and is published in hard copy and electronic format by Van Haren Publishing on behalf of The Open Group. TOGAF®, an Open Group Standard, is a proven enterprise architecture methodology and framework used by the world s leading organizations to improve business efficiency. It is the most prominent and reliable enterprise architecture standard, ensuring consistent standards, methods, and communication among enterprise architecture professionals. Enterprise architecture professionals fluent in TOGAF standards enjoy greater industry credibility, job effectiveness, and career opportunities. TOGAF helps practitioners avoid being locked into proprietary methods, utilize resources more efficiently and effectively, and realize a greater return on investment.