This document defines common terminology used in travel pay operations, including terms like active duty, armed forces, annual training duty, actual expense, active duty for training, defense table of distance, contingency operation, common carrier, commercial travel office, authorizing official, employee, federal travel regulation, government dining facility, foreign area, government quarters, government transportation, government transportation request, home of record, and group movement. Definitions of these terms are provided to familiarize users with terminology needed to perform daily tasks related to travel pay.