| Acronym | Definition |
|---|
| ATTI➣Attitude |
| ATTI➣Association of Teachers in Technical Institutions (now National Association of Teachers in Further and Higher Education) |
| ATTI➣Advanced Transportation Technology Institute |
| ATTI➣Advanced Tracking Technologies, Inc. (est. 1998; Houston, TX) |
| ATTI➣Advanced Technology Transfer and Infusion (JPL) |
| ATTI➣American Telephone and Telegraph Interchange |
| ATTI➣Acoustic Test Target Insertion |