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

Operational definition, Operational auditing, Operational semantics, Operational level of war, The Operational Art of War, Operational risk, Operational system, Operational conversion unit, Operational View, Standardized approach (operational risk), Operational Requirement, Journal of the Operational Research Society, Operational Group (Poland), Operational acceptance testing, Operational amplifier, Operational risk management, Operational Service Medal, Operational excellence, Operational Test and Evaluation Force, The Operational Art of War Vol. 1: 1939–1955, Director, Operational Test and Evaluation, Operational historian, Operational database, Operational Land Forces Command, Common operational picture, Australian Operational Service Medal, Operational artificial intelligence, No. 237 Operational Conversion Unit RAF, Operational Service Medal for Afghanistan, Operational manoeuvre group, Geostationary Operational Environmental Satellite, Operational Research Society, Operational Command South, Operational due diligence, No. 226 Operational Conversion Unit RAF, Operational Land Imager, Operational bill, Operational data store, Common Operational Datasets, Independent Operational Group Narew, Operational Mentoring and Liaison Team, 25th Operational Weather Squadron, Operationalization, The Journal of Operational Risk, 9th Operational Weather Squadron, The Operational Art of War II: Modern Battles 1956–2000, Operational Medical Orderly, No. 240 Operational Conversion Unit RAF, Operational plan, Operational modal analysis, Operational technology, Local operational picture, Tavria operational-strategic group, 11th Operational Weather Squadron, Commander Fleet Operational Standards and Training, Operational transconductance amplifier, 26th Operational Weather Squadron, Operational Command North, 15th Operational Weather Squadron, Operational Service Medal for Sierra Leone, 21st Operational Weather Squadron, Operational loads monitoring, Operational-level agreement, 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amplifier applications, Association of European Operational Research Societies, 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