atp
- Association of Tennis Professionals
- Adenosine Triphosphate
- Advanced Threat Protection
- Access to Patients
- Adult Treatment Panel
- Available To Promise
- Area to Protect
- Airline Transport Pilot
- Army Techniques Publication
- Ambient Temperature and Pressure
- Automatic Train Protection
- Ask the Professor
- Army Training Program
- Acceptance Test Procedure
- Authorized to Proceed
- Australian Technology Park
- Advanced Travel Partner
- Antitachycardia Pacing
- All Tomorrow’s Parties
- Authorization to Proceed
- Alternative Transients Program
- Advanced Technology Program
- Automated Theorem Proving
- After Tax Profit
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