| ATP Electronics | ATP Electronic Developments Ltd supplies the largest range of remanufactured air flow meters and ignition / fuel injection / engine management ecu / ecm`s in the UK and also produced the worlds first universal ecu diagnostic tester, Network 500 | |
| ATRA | Automatic Transmission Rebuilders Association is an international trade association for automatic transmission repair professionals |
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| ATSG | Automatic Transmission Service Group is the largest, Employee-Owned, technical support service in the Automatic Transmission Industry. We offer a Technical Hotline, Books, Software, Bulletins, Seminars, and Technical Courses to the Automatic Transmission Professional | |
| IATN | The International Automotive Technicians' Network is a group of 49,123 professional automotive technicians from 136 countries | |