Operational definition, Operational auditing, Operational semantics, Operational level of war, The Operational Art of War, Operational risk, Operational system, Operational View, Standardized approach (operational risk), Operational Requirement, Operational conversion unit, Operational Group (Poland), Journal of the Operational Research Society, Operational acceptance testing, Operational risk management, Operational amplifier, Operational Service Medal, Operational excellence, The Operational Art of War Vol. 1: 1939–1955, Operational Test and Evaluation Force, Director, Operational Test and Evaluation, Operational historian, Operational database, Operational Research Society, Operational artificial intelligence, Common operational picture, Australian Operational Service Medal, Operational Service Medal for Afghanistan, Operational Land Forces Command, No. 237 Operational Conversion Unit RAF, Geostationary Operational Environmental Satellite, Operational manoeuvre group, Operational due diligence, Operational Land Imager, Operational data store, Operational Command South, No. 226 Operational Conversion Unit RAF, Operational bill, Common Operational Datasets, Independent Operational Group Narew, Operationalization

Operational Mentoring and Liaison Team, 25th Operational Weather Squadron, The Operational Art of War II: Modern Battles 1956–2000, The Journal of Operational Risk, 9th Operational Weather Squadron, Operational modal analysis, No. 240 Operational Conversion Unit RAF, Operational Medical Orderly, Operational plan, Tavria operational-strategic group, 11th Operational Weather Squadron, Operational technology, Commander Fleet Operational Standards and Training, Local operational picture, Operational transconductance amplifier, 26th Operational Weather Squadron, Operational Service Medal for Sierra Leone, 21st Operational Weather Squadron, Operational Command North, Operational loads monitoring, 15th Operational Weather Squadron, Operational stress injury, No. 2 (Coastal) Operational Training Unit RAF, Operational-level agreement, No. 236 Operational Conversion Unit RAF, Operational Silo Test Facility, No. 228 Operational Conversion Unit RAF, Dnipro operational-strategic group, Operational design domain, Naval Center for Combat and Operational Stress Control, Strike Attack Operational Evaluation Unit, Bayesian operational modal analysis, 17th Operational Weather Squadron, New Zealand Operational Service Medal, Ground based operational surveillance system, Operational Service Medal for the Democratic Republic of Congo, No. 2 Operational Conversion Unit RAAF, No. 242 Operational Conversion Unit RAF, NATO Maritime Interdiction Operational Training Centre, Operational efficiency, Operational responsiveness, Aerospace Operational Support Group RAAF, Joint Operational Support Airlift Center, Current-feedback operational amplifier, No. 231 Operational Conversion Unit RAF, Operational transformation, No. 5 Operational Training Unit RAAF, Marine Operational Training Group 81, Air Force Operational Test and Evaluation Center, 403 Helicopter Operational Training Squadron

Operational definition, Operational auditing, Operational semantics, Operational level of war, The Operational Art of War, Operational risk, Operational system, Operational View, Standardized approach (operational risk), Operational Requirement, Operational conversion unit, Operational Group (Poland), Journal of the Operational Research Society, Operational acceptance testing, Operational risk management, Operational amplifier, Operational Service Medal, Operational excellence, The Operational Art of War Vol. 1: 1939–1955, Operational Test and Evaluation Force, Director, Operational Test and Evaluation, Operational historian, Operational database, Operational Research Society, Operational artificial intelligence, Common operational picture, Australian Operational Service Medal, Operational Service Medal for Afghanistan, Operational Land Forces Command, No. 237 Operational Conversion Unit RAF, Geostationary Operational Environmental Satellite, Operational manoeuvre group, Operational due diligence, Operational Land Imager, Operational data store, Operational Command South, No. 226 Operational Conversion Unit RAF, Operational bill, Common Operational Datasets, Independent Operational Group Narew, Operationalization, Operational Mentoring and Liaison Team, 25th Operational Weather Squadron, The Operational Art of War II: Modern Battles 1956–2000, The Journal of Operational Risk, 9th Operational Weather Squadron, Operational modal analysis, No. 240 Operational Conversion Unit RAF, Operational Medical Orderly, Operational plan, Tavria operational-strategic group, 11th Operational Weather Squadron, Operational technology, Commander Fleet Operational Standards and Training, Local operational picture, Operational transconductance amplifier, 26th Operational Weather Squadron, Operational Service Medal for Sierra Leone, 21st Operational Weather Squadron, Operational Command North, Operational loads monitoring, 15th Operational Weather Squadron, Operational stress injury, No. 2 (Coastal) Operational Training Unit RAF, Operational-level agreement, No. 236 Operational Conversion Unit RAF, Operational Silo Test Facility, No. 228 Operational Conversion Unit RAF, Dnipro operational-strategic group, Operational design domain, Naval Center for Combat and Operational Stress Control, Strike Attack Operational Evaluation Unit, Bayesian operational modal analysis, 17th Operational Weather Squadron, New Zealand Operational Service Medal, Ground based operational surveillance system, Operational Service Medal for the Democratic Republic of Congo, No. 2 Operational Conversion Unit RAAF, No. 242 Operational Conversion Unit RAF, NATO Maritime Interdiction Operational Training Centre, Operational efficiency, Operational responsiveness, Aerospace Operational Support Group RAAF, Joint Operational Support Airlift Center, Current-feedback operational amplifier, No. 231 Operational Conversion Unit RAF, Operational transformation, No. 5 Operational Training Unit RAAF, Marine Operational Training Group 81, Air Force Operational Test and Evaluation Center, 403 Helicopter Operational Training Squadron, Independent Operational Group Polesie, Operational Group Ermakov, Operational Group of Russian Forces, No. 232 Operational Conversion Unit RAF, List of Royal Air Force Operational Training Units, List of aircraft carriers operational during World War II, No. 1 Operational Training Unit RAAF, Aeronautical operational control, Operational maintenance, Operational objective, Separate Operational Purpose Division, Institute of Operational Risk, 20th Operational Weather Squadron, Operational Detachment Alpha 574, Clandestine HUMINT operational techniques, 50th Separate Operational Brigade, Jindalee Operational Radar Network, High Altitude Venus Operational Concept, Operational image, Operational Dress Uniform, Operational reporting, NOAA National Operational Model Archive and Distribution System, Overall Operational Command, Operational Response Group, Kakhovka operational group, No. 230 Operational Conversion Unit RAF, Operational calculus, Operational Camouflage Pattern, Operational planning, European Rapid Operational Force, Bundeswehr Operational Command, Operations research, Northwestern Operational Command, Garda Operational Support, Military operation, International Transactions in Operational Research, Second Operational Phase (1942), Operational analytical processing, Operational Group Command, No. 55 Operational Training Unit RAF, Operational due diligence (alternative investments), Operational Collaboration, 28th Operational Weather Squadron, Flying Boat Training Squadron RAF, Operational availability, Operational Command East, Croatian Operational Research Society, Operational Service Medal Iraq and Syria, Overall Operational Commander, Operational Distinguishing Device, Operational Command West, Operational Service Medal (Canada), No. 53 Operational Training Unit RAF, No. 1 (Coastal) Operational Training Unit RAF, Hellenic Operational Research Society, No. 111 (Coastal) Operational Training Unit RAF, Hungary-United States Operational Mentor and Liaison Team, Polar Operational Environmental Satellites, Operationally Responsive Space Office, International Operational Service Medal