AO: Authorizing Official

CBA: Centrally Billed Account

CO: Certifying Officer

DFAS: Defense Finance and Accounting Service

DoD: Department of Defense

DoDFMR: Department of Defense Financial Management Regulation

DTA: Defense Travel Administrator

DTS: Defense Travel System

JTR: Joint Travel Regulations

LOA: Line of Accounting

MOR: Method of Reimbursement

TDY: Temporary Duty

TO: Transportation Officer

USD(C): Under Secretary of Defense (Comptroller)