| Acronym | Definition |
|---|
| OMTA➣Ontario Massage Therapist Association (Canada) |
| OMTA➣Ohio Music Teachers Association |
| OMTA➣Off-Main-Thread Animations (Firefox) |
| OMTA➣Old Mobeetie Texas Association |
| OMTA➣Oregon Music Teachers Association, Inc. |
| OMTA➣Oberlin Musical Theater Association (Oberlin College, Oberlin, Ohio) |
| OMTA➣Open Mobile Terminal Alliance (mobile-phone industry) |
| OMTA➣Orissa Medical Teachers' Association (India) |