| Acronym | Definition |
|---|
| ATTC➣American Type Culture Collection (biological product contract; University of Pennsylvania) |
| ATTC➣Addiction Technology Transfer Center (Kansas City, MO) |
| ATTC➣Aviation Technical Test Center |
| ATTC➣Advanced Television Test Center |
| ATTC➣Aviation Technical Training Center |
| ATTC➣Austrian Traffic Telematics Cluster |
| ATTC➣Aboriginal Tourism Team Canada (now Aboriginal Tourism Canada) |
| ATTC➣ASEAN Timber Technology Centre |
| ATTC➣Automatic Transmission Test and Control Circuit |
| ATTC➣Advanced Television Technology Center, Inc. |
| ATTC➣American Telephone and Telegraph Communications |
| ATTC➣Advanced Technology Transition Council |
| ATTC➣Arabic Teacher Training Course (Allama Iqbal Open University; Pakistan) |