PPO

PPO is a three letter acronym for:

• 2,5-Diphenyloxazole, an organic scintillator
• Personal Protection Officer
• Pfadfinder und Pfadfinderinnen Österreichs
• Planned purchase order, a suggestion by a MRP system that can become a purchase order
• Polish Patent Office
• Polyphenol oxidases, a family of enzymes
• Poly(p-phenylene oxide)
• Preferred Provider Organization or "Participating Provider Option", a type of health insurance plan
• Propylene oxide, an industrial chemical
• Prisons and Probation Ombudsman
• Pure plant oil
• Toray Pan Pacific Open, a Women's Tennis Association tournament
• The Plumber's Philharmonic Orchestra, an orchestra based at McGill University in Montreal Quebec
• Professional Photographers of Ontario
• Platelet Peroxidase, enzyme(s) in platelets with peroxidase activity