The ability to communicate effectively in writing is a vital skill in all professions. This important skill often has little to do with the writerÕs knowledge of English. Therefore, this book is not about the rules of English language per se. This book focuses primarily on the principles of written communication that make oneÕs written message more effective, regardless of which language is used for communication. Written communication effectiveness is defined here as the ability to get oneÕs written message recipient to understand the true intended message with the minimum amount of time and effort. Mastering and practicing these principles will make oneÕs notes, memos, emails, reports, manuals, and books easier to understand.