| Project Apollo | Professor X | Protestant Church of the Netherlands |
| Pre-Islamic period of AfghanistanPrehistory Archaeological exploration began in Afghanistan in earnest after World War II and proceeded until the Soviet invasion of Afghanistan disrupted it in December of 1979. Artifacts typical of the Paleolithic, Mesolithic, Neolithic, Bronze, and Iron | Province of GrossetoGrosseto is a province of Tuscany, Italy. Main reference town of Maremma. Tuscany. | Prince-electorIn the Holy Roman Empire, the prince-electors or electoral princes German: Kurfurst (singular) Kurfursten (plural)—were the members of the electoral college of Holy Roman Empire, having the function of electing the king of Germany before his accession as |
| Prince Harry of WalesHis Royal Highness Prince Henry of Wales (Henry Charles Albert David Mountbatten-Windsor) (born September 15, 1984), nicknamed Prince Harry is a member of the British Royal Family, a grandson of Queen Elizabeth II. Harry is third in the line of succession | Primary sector of industryThe primary sector of industry generally involves the conversion of natural resources into primary products. Most products from this sector are considered commodities or raw materials for other industries. Major businesses in this sector include agricultu | Propositional knowledgePropositional knowledge or declarative knowledge is knowledge that some proposition is either true or false. This distinguishes propositional knowledge from know-how or procedural knowledge, which is the knowledge of how to perform some task. This article |
| Propositional calculusA propositional calculus is a formal, deduction system, or proof theory for reasoning with propositional formulas as symbolic logic. It is also extensional. Compare, by contrast, predicate logic and modal logic, which also have their own calculi. A calcul | Project MercuryProject Mercury was the United States's first successful manned spaceflight program. It ran from 1959 through 1963 with the goal of putting a man in orbit around the Earth. Early planning and research was carried out by NACA, while the program was officia | ProtistRhodophyta (red algae) Heterokontophyta (heterokonts) Cryptophyta (cryptomonads) Pyrrhophyta (dinoflagellates) Apicomplexa Ciliophora (ciliates) Euglenozoa Metamonada Foraminifera Cercozoa Amoebozoa Choanozoa Many others; classification varies The Kingdom |
| Probability | Primate | Precedent |
| Preliminary hearing | Programming language | Printer (publisher) |
| Prion | Prince Edward Island | Pretty Good Privacy |
| Protection (poker) | Propaganda | Preview |
| Protestantism | Prometheus | Protozoa |
| Pretty Tony | Propaganda film | Printing press |
| Proportional representation | Provisional Irish Republican Army | Project Gutenberg |
| Prince Paul | Proton | Promethium |
| Protactinium | Problem of universals | Protest song |
| Professor Griff | Proper name | Prolog |
| Pregnancy | Producer (disambiguation) | Proverb |
| Programming help desk | Probability interpretations | Probability axioms |
| Probability theory | Probability distribution | Preorder |
| Principle of least astonishment | Protocol | Progressive |
| Pressure | Procopius | Property |
| Primary mirror | Protein | Propane |
| Precambrian | Primer | Prime number |
| Prime number theorem | Private international law | Process Church |
| Predestination | Primitive notion | Priest |
| Programmer | Procedural memory | Propeller |
| Presburger arithmetic | Program | Procedural programming |
| Prospero Alpini | Prague Spring | Princetown |
| Prague | Prism | Production Bike Racing |
| Production Car Racing | Protocol stack | Protocol on Environmental Protection to the Antarctic Treaty |
| PRC | Prismatoid | Princeton University |
| Proto-World Language | Prokaryote | Prelude In G Major |
| Private branch exchange | Proteome | Project management |
| Protagoras | Principle of bivalence | Prime Minister |
| President | President of the United States | Prime Minister of Australia |
| Priam | Principia Mathematica | Prime Minister of Canada |
| Process theology | Proton decay | Prime Minister of the United Kingdom |
