Abbreviations beginning with p

PTBOPatellar Tendon-Bearing Orthosis
Academic & Science

PTBOParent Teacher Booster Organization (Framingham High School; Framingham, MA)
Miscellaneous

PTBOPatellar Tendon Bearing Orthosis
Miscellaneous » Unclassified

PTBPPara-Tertiary Butylphenol
Academic & Science

PTBPPretax Transportation Benefits Plan (Research Coporation of the University of Hawaii; Honolulu, HI)
Academic & Science

PTBPPhilippine Time-Bound Program (Department of Labor and Employment; Philippines)
Governmental

PTBRPeripheral-Type Benzodiazepine Receptor Gene (genetics)
Academic & Science

PTBRPolskie Towarzystwo Badan Radiacyjnych (Polish: Polish Radiation Research Society)
Academic & Science

PTBRPage Table Base Register
Computing » Technology

PTBRProfessional Team Bull Riding
Miscellaneous

PTBRBrazilian Portuguese (or in portuguese "Português Brasileiro").
Regional » Countries

PTBRPorTuguese and BRazillian
Regional » Countries

PTBRBPush The Big Red Button
Miscellaneous

PTBSPersistent Turn-Based Server (video game program)
Academic & Science

PTBSPotomac Bancshares, Inc.
Business » NASDAQ Symbols

PTBSPermanent Training in Buddhist Studies
Community » Religion

PTBSPlease Text Back Soon
Internet » Chat

PTBSPosttraumatische Belastungsstoerung
Medical » Diseases

PTBSParking and Transit Benefit System
Miscellaneous » Unclassified