The fourth edition of AHIMA's Pocket Glossary of Health Information Management and Technology is updated to include the essential terms from foundational and emerging HIM and HIT topics. The Pocket Glossary is an essential reference tool for professionals in the healthcare field. Unique and critical vocabulary terms for health information, health informatics, and health IT are defined and described. Every term is reviewed by HIM professionals for accuracy, content, and structure. New to this edition, citations and a full reference list provide additional context and support for Pocket Glossary terms.