Book excerpt: The third edition of AHIMA's Pocket Glossary of Health Information Management and Technology is updated to include ARRA, HITECH, meaningful use, and legal health records. Unique and critical vocabulary terms for health information, health informatics, and health IT are defined and described. This easy-to-use, pocket-sized resource is an indispensable resource and reference tool for navigating important health information terms. New entries include: Federal changes with ARRA and HITECH Electronic and legal health records ICD-10 terms, including root operations Emerging issues in health information Each term is reviewed by AHIMA professional practice staff for accuracy, content, and structure.