| Acronym | Definition |
|---|
| PTT | Postal Telegraph and Telephone |
| PTT | Public Telephone & Telegraph |
| PTT | Push-To-Talk (radio tranceivers) |
| PTT | Partial Thromboplastin Time (test) |
| PTT | Presidential Transition Team (various locations) |
| PTT | Post Telephone and Telegraph |
| PTT | Protocol Task Team |
| PTT | Push to Talk |
| PTT | Postal Telephone and Telegraph |
| PTT | Part of Title |
| PTT | Press to Transmit |
| PTT | Petroleum Authority of Thailand (Bangkok, Thailand) |
| PTT | Property Transfer Tax |
| PTT | Power Trim/Tilt (engines) |
| PTT | Part Task Trainer |
| PTT | Posterior Tibial Tendon |
| PTT | Police Transition Team |
| PTT | Posta Telgraf Ve Telefon (Turkey) |
| PTT | Ponto de Troca de Tráfego (Portuguese: Internet Exchange Point) |
| PTT | Platform Transmitter Terminal |
| PTT | Poly(Trimethylene Terephthalate) (chemical thermoplastic polymer) |
| PTT | Programming Tools and Techniques |
| PTT | Push-To-Test |
| PTT | Professional Technology Temple (Taiwan BBS) |
| PTT | permit to transfer (shipping) |
| PTT | Ministry of Post, Telegraph and Telephone (Iran) |
| PTT | Poker Team Ticket (tournament) |
| PTT | Petits Travailleurs Tranquiles (French: Small Quiet Workers) |
| PTT | Pijama Terlik Televizyon (Turkish) |
| PTT | Poste, Téléphone et Télécommunications (French Post Office) |
| PTT | Professional Technical Trainer |
| PTT | Part-Time Teaching |
| PTT | Protocol Test Tool |
| PTT | Project Tracking Tool |
| PTT | Physical Training Test |
| PTT | Presidential Technology Team |
| PTT | Providers of Telecommunications Training |
| PTT | Precision Pressure Transducer |
| PTT | Plotting Team Trainer |
| PTT | Program Technical Training |
| PTT | Personnel Transition Team |
| PTT | Pittsburg Tank & Tower Company Inc. |
| PTT | Pejabat Telekom Tempatan |