Office of Interdepartmental Regulation 
other intelligence requirements 
Office of Intergovernmental Relations 
Online Insertion and Removal 
Office of Information Resources 
Office of Institutional Research 
Office of International Relations 
Office of Intramural Research 
operational intelligence requirements 
Operations Integration Review 
Offense Investigation Report 
Office for Information Resources 
Office of Industrial Relations 
Office of Industry Relations 
Office of Instructional Resources 
Office of International Research 
Operational and Information Requiremen… 
Operational Intelligence Requirement 
ORC interaction region 
Organisation International de Radiodif… 
Organisation Internationale de la Radi… 
Other Information Requirement 
Other Information Requirements 
Other Intelligence Requirement 
oxygen-induced retinopathy 
Open Item Report