| OIDA | Ontario International Development Agency 
| Others |
| OIDA | Opelika Industrial Development Authority
| Others |
| OIDA | Operating income before depreciation and amortization and restructuring charges
| Others |
| OIDA | Optoelectronics Industry Development Association
| Others |
| OIDA | Oregon Irish Dance Academy
| Others |
| OIDA | Oriental Institute Digital Archives
| Others |
| OIDA | OSA Industry Development Associates
| Others |
| OIDA | Ottawa Influenza Decision Aid
| Others |