- Home
- A: 185 terms
- A cappella music. Unaccompanied vocal music. Rounds
- Abnormal psychology
- Above sea level. Surface relief. Above ground generally. Mountains
- Abstract art. Non-figurative art
- Accidents. Risks. Hazards. Accident prevention. Personal protection. Safety
- Accommodation desires and their fulfilment. Safeguarding accommodation
- Accountancy
- Accoutrements. Beltmaking. Leather equipment and analogous products
- Acoustic measurements
- Activity and organizing. Communication and control theory generally (cybernetics). 'Human engineering'
- Activity of international and intergovernmental organizations
- Acts of worship (by participants)
- Addresses. Lectures. Speeches
- Administrative and auxiliary services: personnel, organization
- Administrative departments of libraries
- Administrative law
- Administrative management. Secretariat
- Adults. Grown-ups
- Advanced architectures. Non-Von Neumann architectures
- Aerial sports
- Aerodynamics
- Aesthetics and film
- Aetiology. Science of the causes of disease
- Afghanistan. Islamic Republic of Afghanistan. Afganistan. Jomhūrī-ye Eslāmī-ye Afġānistān. Da Afġānistān Islāmī Jomhoriyat
- Africa
- African Continental Ancestry Group
- African islands of the Indian and South Atlantic oceans
- Afrikaans
- Afro-Asiatic (Hamito-Semitic) languages
- Afro-Asiatic, Nilo-Saharan, Congo-Kordofanian, Khoisan languages
- Afro-Asiatic, Nilo-Saharan, Congo-Kordofanian, Khoisan languages
- Agricultural hydraulics. Irrigation, drainage and reclamation engineering
- Agricultural machines, implements and equipment
- Agricultural operations
- Agriculture and related sciences and techniques. Forestry. Farming. Wildlife exploitation
- Agriculture in general
- Ainu
- Air and space transport engineering. Aeronautics and aircraft. Rockets and missiles. Astronautics and spacecraft
- Air-force penal law
- Albania. Republic of Albania. Shqipëria. Republika e Shqipërisë
- Albanian
- Albanian language
- Albanian literature
- Algae. Phycology
- Algebra
- Algeria. People’s Democratic Republic of Algeria. Al Jaza'ir. Al Jumhuriyah al Jaza'iriyah ad Dimuqratiyah ash Sha'biyah
- Alimentation. Eating. Digestion. Nutrition
- All languages natural or artificial
- Almanacs. Calendars (of all types)
- Alphabetic writing systems
- Altaic languages
- Amateur handicrafts. Technical hobbies
- America, North and South. The Americas
- American indigenous languages
- American indigenous languages
- American Native Continental Ancestry Group
- Amphibia
- Anabaptists
- Analysis
- Analysis and synthesis of sounds
- Analysis by biological and biochemical reactions. Biological methods used for analytical purposes
- Analysis of different substances. Analytical control in production conditions
- Analysis, investigation and handling in general
- Analytical chemistry
- Analytical palaeontology
- Anatomy. Human and comparative anatomy
- Ancient China and Japan
- Ancient Egypt
- Ancient Egyptian religion
- Ancient Greece
- Ancient India
- Ancient Roman Province of Judaea. The Holy Land. Region of the Israelites
- Ancillary sciences of geology etc.
- Andean languages
- Andean languages. Equatorial languages
- Andorra. The Principality of Andorra. Principat d'Andorra
- Angiospermae (Magnoliophyta). Angiosperms. Flowering plants. Covered-seed plants. Later seed plants
- Angola. Republic of Angola
- Animal embryology. Animal ontogeny. Development of the individual organism
- Animal fibres
- Animal habits. Animal behaviour. Ecology. Ethology. Animal and environment. Bionomy
- Animal health. Veterinary hygiene
- Animal heat. Thermal processes
- Animal histology
- Animal husbandry and breeding in general. Livestock rearing. Breeding of domestic animals
- Animal physiology
- Animals according to breeding
- Animals bred or kept for food or other produce (productivity, yield). Farm and ranch animals in general
- Animals bred or kept for work and service or pleasure of humans
- Animals kept for breeding, showing and scientific uses
- Antarctic territories. South Polar regions
- Anthropogeny. Human development in general. Origin of the human species
- Anura
- Apparatus and equipment for preparation, investigation and analysis
- Apparatus for production and study of phenomena
- Apparatus with wheel or motor mechanisms
- Application, utilization of phenomena
- Application-oriented computer-based techniques
- Applications of acoustics (theory)
- Applications of art (in industry, trade, the home, everyday life)
- Applications of biotechnology
- Applications of music in industry and trade, the home and everyday life
- Applications of optics in general
- Applied botany. Use of plants. Technobotany. Economic botany
- Applied geology and geophysics. Geological prospecting and exploration. Interpretation of results
- Applied graphic arts. Commercial graphics
- Applied linguistics
- Applied microbiology
- Applied psychology (psychotechnology) in general
- APPLIED SCIENCES. MEDICINE. TECHNOLOGY
- Applied, practical geography
- Arabian states and territories
- Arabic
- Araucanian languages
- Arch bridges
- Archaeological, prehistoric, protohistoric periods and ages
- Archaeology
- Archaeology. Prehistory. Cultural remains. Area studies
- Architectural details and finishes. Decoration. Ornament
- Architecture
- Archivistics. Archives (including public and other records)
- Arctic territories
- Area studies. Study of a locality
- Argentina. Argentine Republic. República Argentina
- Armaments. Ordnance. Arms. Weapons. Guns. Artillery. Small arms. Side arms. Armoured and other service vehicles. Ammunition and war gases. Guided missiles and rockets
- Armed forces generally. Armed services. Military life
- Armenia. Republic of Armenia. Hayastan. Hayastani Hanrapetut’yun (Haikakan Hanrapetoutioun)
- Armenian
- Armenian language
- Armenian literature
- Army service generally. Infantry. Foot soldiers
- Aromatic herbs. Plants for seasoning
- Aromatic plants. Condiment plants. Oleaginous plants. Dye plants. Tanning plants. Medicinal plants
- Art of movement. Dance
- Art of the ancient cultures of the Old World. Styles of Antiquity
- Art technique. Craftsmanship
- Articles in serials, collections etc. Contributions
- Articles of iron and steel in general
- Articles of nonferrous metals (except precious metals)
- Articles of precious metals, gems, precious stones
- Articulata
- Articulata
- Artificial furriery
- Artificial intelligence
- Artificial languages
- Artificial languages
- Artificial languages for use among human beings. International auxiliary languages (interlanguages)
- Artificial languages for use among human beings. International auxiliary languages (interlanguages)
- Artificial languages used to instruct machines. Programming languages. Computer languages
- Artillery
- Artillery. Engineers. Aviation. Various technical units and their function
- Artiodactyla (Even-toed ungulates)
- Artistic furniture, heating and lighting devices
- Artistic periods and phases. Schools, styles, influences
- Ascetics. Hermits. Fakirs
- Ashkenazi Judaism
- Asia
- Asian Continental Ancestry Group
- Assault and defence works. Siege works. Field fortifications. Trench works
- Asteridae
- Asteridae
- Astrometry. Spherical astronomy
- Astronomical instruments and techniques
- Astronomy. Astrophysics. Space research. Geodesy
- Attestations. Special-purpose documents
- Audio documents. Sound recordings
- Australia. Commonwealth of Australia
- Australian languages
- Austria. Republic of Austria. Republik Österreich
- Austro-Asiatic languages
- Austro-Asiatic languages. Austronesian languages
- Austro-Asiatic languages. Austronesian languages
- Austronesian languages
- Author bibliographies. Individual bibliographies
- Authorship. Literary activity and technique
- Automatic control technology. Smart technology
- Auxiliary legal sciences. Forensic psychology. Forensic chemistry. Forensic medicine
- Auxiliary sciences and studies of philology
- AUXILIARY TABLES
- Aves (Birds)
- Aves. Fossil birds
- Awards. Honours. Prizes. Distribution of prizes, awards
- Aymara
- Azerbaijan. Azerbaijani Republic. Azərbaycan Respublikası
- Azerbaijani