| Abbreviation | Definition |
|---|---|
| AITN | Associazione Italiana Turismo Natura |
| AITO | Amnesty International |
| AITO | Amnesty International Toronto Organization |
| AITO | Association of Independent Tour Operators |
| AITP | Acoustic Ice Tethered Platform |
| AITP | Application Infrastructure and Transaction Processor |
| AITPA | Associazione Italia Tecnici Prove Ambientali |
| AITR | activation inducible TNF receptor |
| AITR | America instigates the rapture |
| AITR | Associazione Italiana Turismo Responsabile |
| AITS | Adelaide I T Solutions |
| AITS | Advanced Inspector Training Seminars |
| AITS | All India Test Series |
| AITS | Arts in the Square |
| AITS | Automated Interactive Teller System |
| AITT | Aboriginal in Trades Training |
| AITT | Arginine Insulin Tolerance Test |
| AITT | Augmented Immersive Team Trainer |
| AITT | Augmented Immersive Team Training |
| AITU | Asociaci??n de Ingenieros Tecnol??gicos del Uruguay |