| Term | Full Form | Category |
|---|---|---|
| MTA(S) | Mail Transport Agent(S) | Others |
| MTAS | Massage Therapist Association of Saskatchewan | Others |
| MTAS | Matt Talbot Adolescent Services | Others |
| MTAS | Medical Training Application Service | Others |
| MTAS | Minnesota Test of Academic Skills | Others |
| MTAS | Mobile Terminating Access Service | Others |
| MTAS | Multimedia Telephony Application Server | Others |
| MTAS | Municipal Technical Advisory Service | Others |