PPO may refer to:

Law enforcement

Personal Protection Officer The Protection Command is one of the commands within the Specialist Operations directorate of London's Metropolitan Police Service. The command specialises in protective security and has two branches: Royalty and Specialist Protection (RaSP), pr ...

* Personal Protection Order * Police protection order *

Prisons and Probation Ombudsman The Prisons and Probation Ombudsman (PPO) is a public body, appointed by the Secretary of State for Justice. The PPO carries out independent investigations into complaints and deaths in custody. The detailed roles and responsibilities of the PPO ar ...

Public prosecutor's office Public prosecutor's offices are criminal justice bodies attached to the judiciary. They are separate from the courts in Germany, Austria and the German-speaking parts of Switzerland, and are called the Staatsanwaltschaft (). This kind of offi ...

Chemistry and biochemistry

* 2,5-Diphenyloxazole, an organic

scintillator A scintillator ( ) is a material that exhibits scintillation, the property of luminescence, when excited by ionizing radiation. Luminescent materials, when struck by an incoming particle, absorb its energy and scintillate (i.e. re-emit the ab ...

Polyphenol oxidase Polyphenol oxidase (PPO; also polyphenol oxidase i, chloroplastic), an enzyme involved in fruit browning, is a tetramer that contains four atoms of copper per molecule. PPO may accept monophenols and/or ''o''-diphenols as substrates. The ...

s, a family of enzymes *

Poly(p-phenylene oxide) Poly(''p''-phenylene oxide) (PPO), poly(''p''-phenylene ether) (PPE), poly(oxy-2,6-dimethyl-1,4-phenylene), often referred to simply as polyphenylene oxide, is a high-temperature thermoplastic with the general formula (C8H8O)n. It is rarely used ...

, a type of plastic *

Propylene oxide Propylene oxide is an epoxide with the molecular formula C3H6O. This colourless volatile liquid with an odour similar to ether, is produced on a large scale industrially. Its major application is its use for the production of polyether polyols f ...

, an industrial chemical *

Protoporphyrinogen oxidase Protoporphyrinogen oxidase or protox is an enzyme that in humans is encoded by the ''PPOX'' gene. Protoporphyrinogen oxidase is responsible for the seventh step in biosynthesis of protoporphyrin IX. This porphyrin is the precursor to hemoglobin, ...

, an enzyme * Pure plant oil

Other uses

White House Presidential Personnel Office The White House Presidential Personnel Office (PPO), sometimes written as Office of Presidential Personnel, is the part of the White House Office tasked with vetting new appointees. Its offices are on the first floor of the Eisenhower Executive Of ...

, the White House office tasked with vetting new appointees *

Preferred Provider Organization In U.S. health insurance, a preferred provider organization (PPO), sometimes referred to as a participating provider organization or preferred provider option, is a managed care organization of medical doctors, hospitals, and other health care p ...

, a type of health insurance *

Pfadfinder und Pfadfinderinnen Österreichs The Scout movement in Germany consists of a multitude of associations and federations with about 260,000 Scouts and Guides. History Scouting in Germany started in 1909. After World War I, German Scouting became involved with the German Youth ...

, an Austrian Scouting organization * Planned purchase order, part of the purchasing process *

Polish Patent Office The Patent Office of the Republic of Poland (, abbreviated UPRP) is the patent office of Poland. It is based in Warsaw, the capital and largest city of the country. The Office was established on 28 December 1918, shortly after Poland regained ...

Political Parties Order, 2002 The Political Parties Order, 2002 was an executive order in Pakistan stating that any person can become a member of a political party as long as they are not in the service of Pakistan and that a person cannot become a political party office-beare ...

, a chief executive order in Pakistan *

Preferred provider organization In U.S. health insurance, a preferred provider organization (PPO), sometimes referred to as a participating provider organization or preferred provider option, is a managed care organization of medical doctors, hospitals, and other health care p ...

, a type of health insurance plan *

Toray Pan Pacific Open Pan Pacific Open, Tennis tournaments in Japan Hard court tennis tournaments WTA 500 tournaments Recurring sporting events established in 1984 Sports competitions in Tokyo 1984 establishments in Japan ...

, a Women's Tennis Association tournament *

Philippine Philharmonic Orchestra The Philippine Philharmonic Orchestra (PPO) is the resident symphony orchestra of the Cultural Center of the Philippines (CCP). It is currently under the musical direction of its resident conductor and associate conductor, Dr. Herminigildo Raner ...

* Abbreviation of Praefectus Praetorio (Praetorian Prefect), found on inscriptions * Proximal Policy Optimization, a family of reinforcement learning algorithms (part of computer science) *

Populist Party Ontario The Populist Party Ontario (PPO; ) is a minor political party in Ontario, Canada. The party is led by Jim Torma, former People's Party of Canada regional coordinator for Southwestern Ontario. The party's past candidates of record have included for ...

, a minor provincial political party in Ontario, Canada * Plant Phenology Ontology {{disambig