| PTB | Pacific Turbine Brisbane 
| Others |
| PTB | Pack The Bag
| Others |
| PTB | Packet Too Big
| Others |
| PTB | Pakistan Tobacco Board
| Others |
| PTB | Panthera Tigris Bengalis
| Others |
| PTB | Parents and Teachers of Bartlett
| Others |
| PTB | Partido Trabalhista Brasileiro
| Others |
| PTB | Partnerships Technical Bureau
| Others |
| PTB | Pass the Buck
| Others |
| PTB | Passenger Transportation Board
| Others |
| PTB | Passive Treble and Bass
| Others |
| PTB | Patellar Tendon Bearing
| Others |
| PTB | Pave The Bay
| Others |
| PTB | Payload Timing Buffer
| Others |
| PTB | Peer Transaction Bus
| Others |
| PTB | Penn Tree Bank
| Others |
| PTB | Performance Tube Bending
| Others |
| PTB | Personal Transport Bot
| Others |
| PTB | Personal Travel Budget
| Others |
| PTB | Peru Travel Bureau
| Others |
| PTB | Petersburg, Virginia USA
| Others |
| PTB | Peugeot Talbot Belgique
| Others |
| PTB | Pharmacology and Toxicology Branch
| Others |
| PTB | Phineas Taylor Barnum
| Others |
| PTB | Phlebotomy
| Others |
| PTB | Phospho Tyrosine Binding
| Others |
| PTB | Photochemical Tissue Bonding
| Others |
| PTB | Photonics Tech Briefs
| Others |
| PTB | Physical Test Battery
| Others |
| PTB | Physical Therapy Board
| Others |
| PTB | Physikalisch Technische Bundesanstalt
| Others |
| PTB | Physikalish Technische Bundesanstalt
| Others |
| PTB | Pinoy Tech Blog
| Others |
| PTB | Place To Belong
| Others |
| PTB | Plastic Tool Box
| Others |
| PTB | Please Text Back
| Others |
| PTB | Polypyrimidine tract binding
| Others |
| PTB | Polypyrimidine-Tract-Binding
| Others |
| PTB | Poor Terrible Bunch
| Others |
| PTB | Ported Throttle Body
| Others |
| PTB | Position Task Book
| Others |
| PTB | Pounds per Thousand Barrels
| Others |
| PTB | Powers That Be
| Others |
| PTB | Pre Term Birth
| Others |
| PTB | Programming Track Booster
| Others |
| PTB | Project Team Beta
| Others |
| PTB | Project Test Bed
| Others |
| PTB | Ptahhotep's Team Balancer
| Others |
| PTB | Publicly Traded Banks
| Others |
| PTB | Pubtech Batchworks
| Others |
| PTB | PubTech BatchWorks script file
| Others |
| PTB | Punish The Best
| Others |
| PTB | Punjab TextBook Board
| Others |
| PTB | Push The Button
| Others |
| PTB | Push Type Black
| Others |
| PTB | The Powers That Be
| Others |