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- P: 295 terms
- Painting
- Pakistan. Islamic Republic of Pakistan. Islāmī Jumhūrī-ye Pākistān
- Palaeo-Siberian languages
- Palaeogeography
- Palaeontology
- Pali
- Pama-Maric group
- Pama-Nyungan group
- Pamphlets. Brochures
- Panama. Republic of Panama. República de Panamá
- Papua New Guinea. Independent State of Papua New Guinea
- Paraguay. Republic of Paraguay. República del Paraguay. Tetã Paraguái
- Parliaments. Representation of the people. Governments
- Parlour games. Party games
- Partially polarized light
- Participation (number of players), combinations etc.
- Particular activities of public administration
- Particular kinds of compound
- Particular offences. Specific punishable acts
- Particular social recreations, requiring preparations
- Parts of the environment
- Parts, spaces and rooms planned for specific uses
- Pashto (Pushto)
- Patagonian and Fuegian languages
- Pathological anatomy. Morbid anatomy
- Pathological physiology. Processes, mode of action of diseases. Pathogenesis. Study of origin of diseases
- Pathology of the circulatory system, blood vessels. Cardiovascular complaints
- Pathology of the digestive system. Complaints of the alimentary canal
- Pathology of the lymphatic system, haemopoietic (haematopoietic) organs, endocrines
- Pathology of the organs of locomotion. Skeletal and locomotor systems
- Pathology of the respiratory system. Complaints of the respiratory organs
- Pathology of the urogenital system. Urinary and sexual (genital) complaints. Urology
- Pathology. Clinical medicine
- Pattern games or puzzles requiring patience or dexterity
- Pattern information processing
- Pattern of property variations
- People as providers of social welfare assistance
- Peoples associated with particular places
- Performance, presentation (in original medium)
- Periodical literature. Writings in serials, journals, reviews. Journalism. Occasional literature. Polemic, political writings. Pamphleteering
- Periodicals (in the strict sense)
- Periodicity. Frequency. Recurrence at specified intervals.
- Periods and phases in the history of music. Musical schools, styles and influences
- Periods and phases of architecture. Schools, styles, influences
- Peripherals. Input-output units
- Perissodactyla (Odd-toed ungulates)
- Persian
- Personal documents. Correspondence. Letters. Circulars
- Personal hygiene. Clothing
- Personal requisites. Household management
- Personnel management. Human Resources management
- Persons according to age or age-groups
- Persons according to constitution, health, disposition, hereditary or other traits
- Persons according to domicile and its relation to work or other activity
- Persons according to economic categories (means, security, other rights)
- Persons according to education, training, experience
- Persons according to ethnic characteristics, nationality, citizenship etc.
- Persons according to executive functions
- Persons according to gender and kinship
- Persons according to general constitution, disposition or character
- Persons according to income sources or insurance
- Persons according to intelligence and mental or psychological state
- Persons according to marriage, family or other civil status
- Persons according to occupation, work, livelihood, education
- Persons according to physical state and health
- Persons according to sexual orientation
- Persons according to social class or status
- Persons according to social class, civil status
- Persons according to temperament, predisposition
- Persons according to work, employment, administrative status
- Persons and personal characteristics in pathology. Characteristics of the patient
- Persons and things in international law
- Persons as agents, doers, practitioners (studying, making, serving etc.)
- Persons as targets, clients, users (studied, served etc.)
- Persons belonging to marginal socioeconomic categories. Fringe groups
- Persons in collateral relation
- Persons in filial or descendant relation
- Persons in parental or ascendant relation. Ancestors. Forebears
- Persons in relation to workplace, site of employment. Persons in relation to the enterprise
- Persons in religion
- Perspective in drawing
- Peru. Republic of Peru. República del Perú
- Petrology. Petrography
- Pharmaceutical preparations. Medical material. Equipment
- Pharmacology. Therapeutics. Toxicology
- Phase relations
- Phenomena in time. Phenomenology of time
- Philippines. Republic of the Philippines. Republika ng Pilipinas
- Philosophical systems and points of view
- Philosophy of culture. Cultural systems. Theory of cultural complexes
- Philosophy of mind and spirit. Metaphysics of spiritual life
- PHILOSOPHY. PSYCHOLOGY
- Pholidota. Xenarthra
- Phonetics. Phonology
- Photogrammetry: aerial, terrestrial
- Photographic equipment, apparatus and materials
- Photographic operations
- Photographic systems, processes (especially those using inorganic substances or physical phenomena)
- Photographs according to intermediate stages
- Photographs according to support or base material
- Photographs, pictures or prints according to appearance, form or size
- Photography and exposures according to ambient conditions
- Photography and similar processes
- Photolithography. Photographic production of planographic plates
- Photomechanical processes generally
- Physical and physicochemical operations and equipment. Physical and physicochemical effects on chemical processes
- Physical anthropology
- Physical chemistry
- Physical chemistry of solids, liquids and gases
- Physical geography
- Physical nature of matter
- Physical oceanography. Submarine topography. Ocean floor
- Physical planning. Regional, town and country planning. Landscapes, parks, gardens
- Physical properties and phenomena. Constants. Effects acting on state and properties of matter
- Physical, physicochemical and electrical operations
- Physicochemical methods of analysis (other than optical methods)
- Physics
- Physiographic designation
- Physiography
- Physiological acoustics. Medical acoustics
- Physiology. Human and comparative physiology
- Physiotherapy. Physical therapy. Radiotherapy. Other nonmedicinal therapeutic treatment
- Pictorial material
- Pictorial, artistic photography. Photographs according to subject
- Picture writing
- Pigs. Swine
- Pisces (Fishes) (scientifically outdated class)
- Place and space in general. Localization. Orientation
- Places and areas according to privacy, publicness and other special features
- Places of the ancient and mediaeval world
- Planets and their satellites. Planetology
- Planning of landscape (natural and designed). Parks. Gardens
- Planographic techniques. Lithography (autolithography)
- Plant damage, injuries. Plant diseases. Pests, organisms injurious to plants. Plant protection
- Plant diseases. Plant pathology. Phytopathology
- Plant histology
- Plant management. Physical resources management
- Plant morphology. Plant anatomy
- Plant physiology
- Plantae
- Plants with edible stalks, leaves or flowers
- Plants yielding stimulants. Beverage plants
- Plasma physics
- Plastic arts
- Plastics
- Platyrrhini
- Pneumatic energy, machinery and tools. Refrigeration
- Poetry. Poems. Verse
- Poisoning. Intoxication
- Poland. Polish Republic. Rzeczpospolita Polska
- Polarization. Double refraction. Dispersion in anisotropic bodies
- Polarized light
- Polish
- Polish language
- Polish literature
- Political influence, pressure, on other states
- Political parties and movements
- Politics
- Polygraphies. Collective works
- Polynesia. States and regions of Polynesia
- Popular, traditional, historic vocal music
- Population
- Population. Depopulation
- Porcelain
- Porcelain. China
- Ports, harbours and roadsteads: engineering and construction works in general
- Portugal. Portuguese Republic. República Portuguesa
- Portuguese
- Portuguese language
- Portuguese literature
- Positive law. Legal norm. Enacted law. Statute law. Ius scriptum. Operation of legal norm. Rules of its application
- Possible philosophical attitudes. System typology
- Post-Renaissance
- Postal services and administration
- Potable alcohol. Spirituous liquors (ardent spirits). Alcohol distillation, refining
- Poultry
- Power of the state. System and function of organs of government
- Practical knowledge of languages
- Practical laboratory chemistry. Preparative and experimental chemistry
- Prakrit
- Preaching (as education and instruction)
- Precambrian to Mesozoic (from more than 600 to 70 MYBP)
- Precision mechanisms and instruments
- Prehistoric and primitive religions
- Prehistoric art. Primitive art (ancient and modern)
- Prehistoric religions
- Prehistory. Prehistoric remains, artefacts, antiquities
- Preliminary investigation. Mine surveying and mapping. Exploration of mineral deposits (surface and underground)
- Presentation in chronological, historical form. Historical presentation in the strict sense
- Presentation in historical form. Legal and historical sources
- Presentations of art of movement. Choreography
- Preservation of rural and urban amenities generally
- Pressure. Pressure range
- Prevention and control of communicable (infectious, contagious) diseases. Prevention of epidemics
- Prices. Price formation. Costs
- Primary divisions of a country. Regions (generally). States in a federation
- Primates
- Primitive religions
- Principal stages of cinema development
- Principles and practice of physical planning. Regional, town and country planning