| Acronym | Definition |
|---|
| OPAS➣Opera and Performing Arts Society (Texas A&M University) |
| OPAS➣Overpass (street type) |
| OPAS➣Office of the Pensions Advisory Service (UK) |
| OPAS➣Ontario Plein Air Society (Canada) |
| OPAS➣Oconee Performing Arts Society (Greensboro, GA) |
| OPAS➣Operations Planning and Analysis Systems |
| OPAS➣Outpatient Pharmacy Anticoagulation Service |
| OPAS➣Officer Performance Appraisal System |
| OPAS➣Overhead Panel Arinc System |
| OPAS➣Overseas Personal Address Service (est. 1990) |
| OPAS➣Outside Plant Area Supervisor (telecommunications; telephony) |
| OPAS➣Organizational Performance Assessment System (agricultural research) |
| OPAS➣On Press Application System (Mead Corporation) |
| OPAS➣Orchestra Planning Administration System |