Other
- 4-Methylthioamphetamine
- Manufacturing Technologies Association, UK trade association
- Material transfer agreement, governing the transfer of research materials between two organizations
- Metastasis-associated protein:
- MTA1
- MTA2
- MTA3
- Mid-Term Adjustment, a change in an insurance policy
- Mineral trioxide aggregate, dental filling material, mostly used in endodontics
- Mormon Transhumanist Association
Read more about this topic: MTA