| Abbreviation | Definition |
|---|---|
| NYSSCPA | New York State Society of Certified Public Accountants |
| NYSSD | New York State School for the Deaf |
| NYSSPE | New York State Society of Professional Engineers |
| NYSSSA | New York State Summer School for the Arts |
| NYSSSPA | New York State Summer School Principals Association |
| NYSTCE | New York State Teacher Certification Examination |
| NYSTEA | New York State Technology Education Association |
| NYW | New York City Municipal Water Finance Authority |
| O | Oakland |
| O | Omaha |
| OAG | Ohio Attorney General |
| OAG | Oklahoma Attorney General |
| OAG | Oregon Attorney General |
| OAL | Office of Administrative Law |
| OAMA | Oklahoma Association of Municipal Attorneys |
| OAMP | Ohio Apple Marketing Program |
| OAMP | Ontario Automotive Modernization Program |
| OAMP | Oregon Association of Mounted Posses |
| OAOC | Otsego Area Occupational Center |
| OASDI | Old Age and Survivors Disability Insurance |