| OCC | Counsellor to the Commissioner 
| Others |
| OCC | O'okiep Copper Company
| Others |
| OCC | Oakland Community College
| Others |
| OCC | Object Class Cardinality
| Others |
| OCC | Object Class Code
| Others |
| OCC | Object Component Control
| Others |
| OCC | Object-oriented Compiler Construction
| Others |
| OCC | Obligatory Cinema Content
| Others |
| OCC | Obligatory Classical Content
| Others |
| OCC | Oblique Coherent Contrast
| Others |
| OCC | Obscure Canon Character
| Others |
| OCC | Obsessive Complusive Cosmetics
| Others |
| OCC | Obsessive Compulsive Cosmetics
| Others |
| OCC | Occasionally
| Others |
| OCC | Occasionally Connected Computing
| Others |
| OCC | Occiput
| Others |
| OCC | Occupant
| Others |
| OCC | Occupation
| Others |
| OCC | Occupational Character Class
| Others |
| OCC | Occurrence
| Others |
| OCC | Ocean County College
| Others |
| OCC | Ocean Cruising Club
| Others |
| OCC | Octagon Car Club
| Others |
| OCC | Odd Cross-Correlation
| Others |
| OCC | Off Camber Crawler
| Others |
| OCC | Off Camber Crawlers
| Others |
| OCC | Off-Campus College
| Others |
| OCC | Office of Child Care
| Others |
| OCC | Office of Community Care
| Others |
| OCC | Office of Consumer Counsel
| Others |
| OCC | Office of Contract Compliance
| Others |
| OCC | Office of the Comptroller of the Currency
| Others |
| OCC | Officer Course Code
| Others |
| OCC | Ohio Cardinal Conference
| Others |
| OCC | Ohio Cobra Club
| Others |
| OCC | Ohio Consumers Counsel
| Others |
| OCC | Ohio Corvette Club
| Others |
| OCC | OHNO Continuous Cast
| Others |
| OCC | Ohno Continuous Casting
| Others |
| OCC | Okanagan Corvette Club
| Others |
| OCC | Oklahoma Corporation Commission
| Others |
| OCC | Okoboji Classic Cars
| Others |
| OCC | Old Car Club
| Others |
| OCC | Old Celica Club
| Others |
| OCC | Old Chrysler Corporation Auto Club
| Others |
| OCC | Old Classic Car
| Others |
| OCC | Old Concept Cars
| Others |
| OCC | Old Corrugated Cardboard
| Others |
| OCC | Old Corrugated Container
| Others |
| OCC | Old Corrugated Containers
| Others |
| OCC | Oldie Car Cover
| Others |
| OCC | Oldsmobile Club of Canada
| Others |
| OCC | Oldsmobile Cutlass Coupes
| Others |
| OCC | Oldtimer and Cars Club
| Others |
| OCC | Oldtimer Classic Cars
| Others |
| OCC | Olney Central College
| Others |
| OCC | Olympic Corrections Center
| Others |
| OCC | Omaha Cornbelt Council
| Others |
| OCC | On Command Connection
| Others |
| OCC | One City Challenge
| Others |
| OCC | One Click Computer
| Others |
| OCC | Online Credit Charging
| Others |
| OCC | Online Curriculum Centre
| Others |
| OCC | Onondaga Community College
| Others |
| OCC | Ontario Camaro Club
| Others |
| OCC | Ontario Chamber of Commerce
| Others |
| OCC | Opala Clube Catanduva
| Others |
| OCC | Opel Car Collection
| Others |
| OCC | Opel Corsa Club
| Others |
| OCC | Open Cash Credit
| Others |
| OCC | Open Characteristic Curve
| Others |
| OCC | Open Charging Station Controller
| Others |
| OCC | Open Circuit Characteristics
| Others |
| OCC | Open Cloud Computing
| Others |
| OCC | Open Cloud Consortium
| Others |
| OCC | Open Code Collection
| Others |
| OCC | Open Commons Consortium
| Others |
| OCC | Open Cooperative Computing
| Others |
| OCC | OpenCitations Corpus
| Others |
| OCC | Operating and Control Console
| Others |
| OCC | Operation Care and Comfort
| Others |
| OCC | Operation Christmas Child
| Others |
| OCC | Operation Control Center
| Others |
| OCC | Operational Control Center
| Others |
| OCC | Operations Computer Center
| Others |
| OCC | Operations Control Center
| Others |
| OCC | Operations Control Centre
| Others |
| OCC | Optical Cable Code
| Others |
| OCC | Optical Cable Corporation
| Others |
| OCC | Optical Communication Channel
| Others |
| OCC | Optical Cross Connect
| Others |
| OCC | Options Clearing Corporation
| Others |
| OCC | Oracle Cloud at Customer
| Others |
| OCC | Oracle Commerce Cloud
| Others |
| OCC | Oracle Compute Cloud
| Others |
| OCC | Oral Communication Center
| Others |
| OCC | Orange C Compiler
| Others |
| OCC | Orange Coast College
| Others |
| OCC | Orange Coast College's
| Others |
| OCC | Orange County Canaanites
| Others |
| OCC | Orange County Chapter
| Others |
| OCC | Orange County Choppers
| Others |
| OCC | Order of Chaos and Corruption
| Others |
| OCC | Oregon Convention Center
| Others |
| OCC | Organic Commodity Commission
| Others |
| OCC | Organic Cotton Coil
| Others |
| OCC | organization of the Caribbean community
| Others |
| OCC | Original Character Creation
| Others |
| OCC | Original Corvette Club
| Others |
| OCC | Originating Call Control
| Others |
| OCC | Osiris Chess Club, Homewood, Alabama
| Others |
| OCC | Osprey Custom Cars
| Others |
| OCC | Osteopathic Continuous Certification
| Others |
| OCC | Oswaldtwisle Community Church
| Others |
| OCC | Other Charges and Credits
| Others |
| OCC | Other Common Carrier
| Others |
| OCC | Ottawa Citroen Club
| Others |
| OCC | Ouachita Correctional Center
| Others |
| OCC | Out of Character Chat
| Others |
| OCC | Outer Case Code
| Others |
| OCC | Output Circuit Check
| Others |
| OCC | Output Control Cell Counter
| Others |
| OCC | Outside the Classroom Curriculum
| Others |
| OCC | Outsiders Car Club
| Others |
| OCC | Over Cutter Camera
| Others |
| OCC | Over-the-Counter Choppers (generic false teeth)
| Others |
| OCC | Overclockers Club
| Others |
| OCC | Overlake Christian Church
| Others |
| OCC | Overseas Committee Chair
| Others |
| OCC | Owens Community College, Toledo, Ohio
| Others |
| OCC | Owensboro Community College
| Others |
| OCC | Owl City Concert
| Others |
| OCC | Oxidation Catalytic Converter
| Others |
| OCC | Ozark Christian College
| Others |
| OCC | Ozaukee Corvette Club
| Others |