| Acronym | Definition |
|---|
| OPTC➣Ontario Pipe Trades Council (Hamilton, Ontario, Canada) |
| OPTC➣Oriental Professional Thai Chef (School of the Oriental Hotel Apprenticeship Programme; Thailand) |
| OPTC➣Operating Permit to Construct (Nevada) |
| OPTC➣Occult Papillary Thyroid Cancer (oncology) |
| OPTC➣Ontario Pesticide Training and Certification (University of Guelph Ridgetown; Ridgetown, Ontario, Canada) |
| OPTC➣Ontario Property Tax Credit (Canada) |