| Acronym | Definition |
|---|
| PCO | Privy Council Office (Canada, UK, Senior Government Office) |
| PCO | Pest Control Operator |
| PCO | Public Carriage Office (licence; UK) |
| PCO | Procurement Contracting Officer |
| PCO | Professional Congress Organizer (hospitality industry) |
| PCO | Pennsylvania College of Optometry (Elkins Park, Pennsylvania) |
| PCO | Provisional Constitutional Order |
| PCO | Public Call Office |
| PCO | Posterior Capsular Opacification (ophthalmology) |
| PCO | Project and Contracting Office (US DoD) |
| PCO | Primary Care Office |
| PCO | Prospective Commanding Officer |
| PCO | Proanthocyanidin |
| PCO | Poly Cystic Ovarian (syndrome/disease) |
| PCO | Parliamentary Counsel Office (various countries) |
| PCO | Poste de Commandement Opérationnel (French: Operational Command Post) |
| PCO | Point of Control and Observation (TTCN) |
| PCO | Pleasure Craft Operator (Canada) |
| PCO | Private Cable Operator |
| PCO | Program Coordination Office |
| PCO | Proposed Change Order |
| PCO | Police Communications Officer |
| PCO | Project Control Office |
| PCO | Potential Change Order (construction management) |
| PCO | Procyanidolic Oligomer (flavonoid) |
| PCO | Principal Contracting Officer |
| PCO | Procuring Contract Officer |
| PCO | Pittsburgh Civic Orchestra |
| PCO | Power Control Optimization |
| PCO | Primary Control Officer |
| PCO | Peg Count and Overflow |
| PCO | Provincial Cultural Organization |
| PCO | Plant Control Office (Hekimian) |
| PCO | Primary Care Optimization |
| PCO | Publications Control Officer |
| PCO | Product Change Order |
| PCO | Property Custodial Officer (US NIH) |
| PCO | Property Control Office (USMC) |
| PCO | Printing Control Officer |
| PCO | Pre-Conditioned Order (Ciena) |
| PCO | Portsmouth Community Orchestra (Portsmouth, OH) |
| PCO | Policy and Communication Office |
| PCO | Production Change Order (legal document required to make changes in production of a product) |
| PCO | Police Control Office |
| PCO | Planned Carryover |
| PCO | Perturbational Crystal Orbital |
| PCO | Procedure Change Order |
| PCO | People Capability Office |
| PCO | Physician Contracting Organization |
| PCO | Procurement Change Order |
| PCO | Poinciana Civic Organization |
| PCO | Primary Credit Officer |
| PCO | Paging Channel Operation |
| PCO | Program Contracting Office/Officer |
| PCO | Prerelease Change Order |
| PCO | Principal Controlling Officer |
| PCO | Program Control Office/Officer |
| PCO | Plant Control Operations (telecommunications) |
| PCO | Purchasing Contracting Office |
| PCO | Public Call Outlet |
| PCO | Progress in Combinatorial Optimization |
| PCO | Professional Conduct and Opportunities |
| PCO | Peabody Concert Orchestra (Baltimore, MD) |
| PCO | Phone Cards Online |
| PCO | Process Control Outlet (various locations) |
| PCO | Planning and Coordination Office (various organizations) |
| PCO | Philharmonic Chamber Orchestra |
| PCO | Protective Order Conditions (NCIC form datum) |