- GEO 000: Belonging to the Subject; not further Classified
- GEO 001: Geoscience in GeneralPhotogrammetry, see BAU 950
- GEO 010: Geography
- GEO 011: Complete Overview
- GEO 013: Geographical Onomastics; Gazetteers
- GEO 015: Functions; Methods; Classification of Geography
- GEO 017: Realisation of Expeditions; Field-Trips (General Instructions for Observation; Fieldwork, ...)
- GEO 019: Methodology and Didactics of Lessons / Coursework in Geography
- GEO 020: Climatic Geography
- GEO 011: Complete Overview
- GEO 030: Physical Geography
- GEO 031: Hydrogeography
- GEO 032: Biogeography
- GEO 035: Phytogeography
- GEO 040: ZoogeographyZoogeography,Paleobiogeography see also BIO 710
- GEO 045: General Natural Landscape Studies
- GEO 035: Phytogeography
- GEO 031: Hydrogeography
- GEO 050: Anthropogeography / Human Geography
- GEO 051: Population Geography
- GEO 052: Distribution of Human Beings Throughout the World (Ethnic Classification, People, Culture Groups, ...)
- GEO 053: Indigenous Peoples; Nomads; Migration
- GEO 054: Human Settlement Areas of the World; Limits of Ecumenism
- GEO 055: Adaptation to Climates, Climate Change, and Regions: Nutrition under Various Climatic Conditions
- GEO 056: Spread of Diseases and Influence of the Geographical Environment (Geomedicine)
- GEO 057: Emigration and Immigration; Internal and Pendular Migration
- GEO 058: Rural Exodus, Migration from Rural Oases, from Islands, from Mountains to Urban Areas; Urbanization
- GEO 059: Other
- GEO 052: Distribution of Human Beings Throughout the World (Ethnic Classification, People, Culture Groups, ...)
- GEO 060: Settlement Geography
- GEO 061: Settlements According to Geographical Distribution and Location (Individual Settlements, Group Settlements, ...)
- GEO 062: Settlements According to Function (Monastic Settlements, Administrative Settlements, Winter Sports Settlements, ...)
- GEO 063: Settlement Features; Range of Settlement Types; Settlement Layout / Floor Plans; Settlement Elevations
- GEO 064: Facilities; Infrastructure
- GEO 065: Rural Settlements
- GEO 066: Special Forms of Settlement (Suburbs / Outskirts, Shopping Malls, ...)
- GEO 067: Urban Geography
- GEO 069: Other
- GEO 061: Settlements According to Geographical Distribution and Location (Individual Settlements, Group Settlements, ...)
- GEO 051: Population Geography
- GEO 070: Economic Geography
- GEO 071: Agricultural Geography(Cultivation Methods,types of Forms, Reallocation of Agricultural Land)
- GEO 072: Geography of Forestry and Timber Industry
- GEO 073: Geography of Fisheries
- GEO 074: Geography of Mining and Energy Industries (Useful Minerals / Natural Resources, Crude Oil / Petroleum, Natural Gas, Nuclear Energy, ...)
- GEO 075: Skilled Trades; Trade / Commerce
- GEO 076: Geography of Industrial Practice
- GEO 078: Economic Areas and Classification According to Economic Area
- GEO 079: Other
- GEO 071: Agricultural Geography(Cultivation Methods,types of Forms, Reallocation of Agricultural Land)
- GEO 080: Commercial Geography / Geography of Trade
- GEO 090: Traffic Geography
- GEO 091: Modes of Transport; Means of Transport; Traffic Routes
- GEO 092: Road and Inland Traffic
- GEO 093: Sea Transport / Traffic
- GEO 094: Air Transport / Traffic
- GEO 095: Rush-Hour and Commuter Traffic
- GEO 096: Recreational Traffic and TourismTourism in Land-Use Planning see RPL 818
- GEO 097: Communication and Capital Flows
- GEO 092: Road and Inland Traffic
- GEO 098: Traffic Areas
- GEO 099: Other
- GEO 091: Modes of Transport; Means of Transport; Traffic Routes
- GEO 100: Social Geography
- GEO 101: Analytical Social Geography
- GEO 102: Systematic Social Geography
- GEO 103: Classification of Social Areas (Social Groups; Social Environment)
- GEO 104: Cultural Geography
- GEO 105: Geography of Language and Dialect Families
- GEO 106: Geography of Religious Groups / Religious Geography
- GEO 108: Geography of Nations and States (Political Geography, Military Geography, ...)
- GEO 109: Other
- GEO 101: Analytical Social Geography
- GEO 110: Historical Geography
- GEO 120: Cultural Geography; Studies of Cultivated Landscapes
- GEO 130: Applied GeographyRegional Studies; Regional Planning; Land Use Planning / Country Planning, see ARC 900
- GEO 140: Atlases
- GEO 145: Maps
- GEO 150: Regional Geography
- GEO 153: General and Comparative Regional Geography
- GEO 155: Several Continents and Large Geographical Zones
- GEO 157: Developing Countries; Newly Industrialized Countries
- GEO 158: Industrial / Developed Countries
- GEO 159: Other
- GEO 160: Europe
- GEO 161: Larger Subareas
- GEO 162: European Union (including Predecessor Organizations)
- GEO 163: Former COMECON Countries (Council for Mutual Economic Assistance)
- GEO 164: Baltic
- GEO 165: Central Europe
- GEO 170: Germany
- GEO 173: Germany , (including Federal Republic of Germany Prior to Re-Unification 1990)
- GEO 174: Northern Germany
- GEO 180: Central Germany and West Germany
- GEO 185: Southern Germany
- GEO 186: Baden-Wuerttemberg
- GEO 190: Bavaria
- GEO 191: Franconia (Franconian Jura, Scarplandscape...)
- GEO 192: Upper Palatinate (Bayerische Randgebirge Bavarian Border Mountains , ...)
- GEO 193: Lower Bavaria (Hügelland Lower Bavarian Tertiary Hill Country, ...)
- GEO 194: Swabia (Moraine Landscapes of the Diluvial Iller/lech Glacier, ...) (Iller, Lech = Confluences of the River Danube)
- GEO 195: Upper Bavaria (Moraine Landscapes of the Diluvial Loisach/isar, the Inn/chiemsee and the Salzach Glacier (Loisach, Isar, Inn, Salzach = Rivers; Chiemsee = Lake)
- GEO 198: Bavarian Alps and Prealps
- GEO 191: Franconia (Franconian Jura, Scarplandscape...)
- GEO 186: Baden-Wuerttemberg
- GEO 199: Other
- GEO 174: Northern Germany
- GEO 200: Germany (including Former German Democratic Republic until 1990)
- GEO 170: Germany
- GEO 210: Central Europe excluding Germany
- GEO 220: Northern Europe
- GEO 230: Western Europe
- GEO 240: Southern Europe (Mediterranean Countries)
- GEO 245: Southeastern Europe
- GEO 250: Eastern Europe
- GEO 252: Successor States of the Soviet Union (Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Republic of Moldova, Russian Federation, Tajikistan, Turkmenistan, Ukraine, Uzbekistan)
- GEO 252: Successor States of the Soviet Union (Armenia, Azerbaijan, Belarus, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Republic of Moldova, Russian Federation, Tajikistan, Turkmenistan, Ukraine, Uzbekistan)
- GEO 161: Larger Subareas
- GEO 260: Asia (excluding Former Soviet Union)
- GEO 261: Middle East (Iraq, Islamic Republic of Iran, Israel, Yemen, Jordan, Lebanon, Saudi Arabia, Syrian Arab Republic, Turkey, ...)
- GEO 262: Southern Asia (Afghanistan, Bangaldesh, Bhutan, India, Nepal, Pakistan, Sri Lanka)
- GEO 263: Southeast Asia (Farther India: Cambodia, Laos People's Democratic Republic, Malaysia, Myanmar, Thailand, Vietnam; Brunei, Indonesia, Philippines, Singapore)
- GEO 264: Central Asia; Inner Asia
- GEO 265: East Asia (China, Japan, Korean Peninsula, Mongolia, Taiwan)
- GEO 261: Middle East (Iraq, Islamic Republic of Iran, Israel, Yemen, Jordan, Lebanon, Saudi Arabia, Syrian Arab Republic, Turkey, ...)
- GEO 270: Africa
- GEO 271: North Africa (Egypt, Algeria, Libya, Morocco, Tunisia)
- GEO 272: Sub-Saharan Africa
- GEO 273: Sahara and Sudan (General Region) (Chad, Niger, South Sudan, Sudan)
- GEO 274: Western Sahara (Burkina-Faso, Mali, Mauritania, Western Sahara)
- GEO 275: West Africa (Ghana, Guinea, Nigeria, Senegal, Togo, ...)
- GEO 276: Central Africa (Angola, Central African Republic, Congo, Democratic Republic of the Congo, Equatorial Guinea, Gabon)
- GEO 277: East Africa (Ethiopia, Burundi, Djibouti, Eritrea, Kenya, Malawi, Mozambique, Rwanda, Somalia, United Republic of Tanzania, Uganda)
- GEO 278: South Africa (Botswana, Lesotho, Namibia, South Africa, Zambia, Zimbabwe, Swaziland)
- GEO 271: North Africa (Egypt, Algeria, Libya, Morocco, Tunisia)
- GEO 279: Islands (Madeira, Canary Islands, Madagascar, Seychelles)
- GEO 280: Americas
- GEO 290: Australia; New Zealand; Oceania
- GEO 295: Polar Regions
- GEO 153: General and Comparative Regional Geography
- GEO 300: Geology
- GEO 302: Remote Sensing; Photogeology
- GEO 304: Field Geological, Geometric and Statistical Methods; Data-Processing; Field MappingMine Surveying, see BER 100
- GEO 306: History of Geology and Mineralogy; History of Geological Institutions and History of Geodidactics
- GEO 308: Biographies and Letters of Distinguished Geologists
- GEO 302: Remote Sensing; Photogeology
- GEO 310: General Geology
- GEO 312: Marine Geology; Oceanography; Marine Ecology
- GEO 313: Limnology
- GEO 314: Spelaeology (Scientific Study of Caves); Karst/ Mattock
- GEO 315: Pedology (Soil Science); Weathering (Aging / Ageing)
- GEO 316: Glaciology; Geomorphology
- GEO 317: Patterned Ground (Formerly also Known as Frost Pattern Soil), Periglacial, Geocryology
- GEO 318: Volcanology; Magmatism
- GEO 319: Extraterrestrial Geology and Cosmochemistry;planetary System: Meteorite Studies and Meteorite Craters
- GEO 312: Marine Geology; Oceanography; Marine Ecology
- GEO 320: Applied Geology (Soil Development and Soils)
- GEO 322: Engineering Geology; Technical Geology; Building Ground Geology
- GEO 323: Soil Mechanics; Rock Mechanics (Both Fels and Gebirge); Soil Engineering
- GEO 324: Technical Mineralogy / Petrography; Geology of (Natural) Resources
- GEO 325: Hydrogeology; Hydrology; Balneology; Water Resources ManagementMining Hydrogeology, see BER 350
- GEO 326: (Crude) Oil Geology; Natural Gas; (Crude) Bitumen / Asphalt; Oil Shale and Ozocerite
- GEO 328: Environmental Geology; Geology and Environmental Protection; Disposals / Landfill Sites; Geology and Society
- GEO 322: Engineering Geology; Technical Geology; Building Ground Geology
- GEO 330: Regional Geology and Mineralogy
- GEO 331: Europe
- GEO 332: Central and Northern Germany, Benelux: Geological Overviews
- GEO 333: Central and Northern Germany, Benelux: Guides and Regional Descriptions, Topical Works
- GEO 334: Southern Germany including Saarland: Geological Overviews
- GEO 335: Southern Germany including Saarland: Guides and Regional Descriptions, Topical Works
- GEO 338: Scandinavia
- GEO 339: Great Britain; Ireland; North Sea
- GEO 340: France; Swiss Jura Mountains
- GEO 341: Spain; Portugal; Italy
- GEO 342: Czech Republic; Slovakia (Former Czechoslovakia)
- GEO 343: Romania; Poland, Hungary
- GEO 344: Bulgaria; Albania; Serbia, Montenegro, Bosnia and Herzegovina, the Former Yugoslav Republic of Macedonia, Croatia, Slovenia, Kosovo; Greece; Mediterranean and Tethys Ocean Literature
- GEO 345: Alps with Switzerland, Austria, Liechtenstein
- GEO 346: Western Alps; Southern Part (with Rhone Basin and Foothills of the Alps)
- GEO 347: Western Alps; Northern Part (with Flysch and Helvetic Nappes West of the Iller (Iller = Confluence of the River Danube))
- GEO 348: Eastern Alps; Northern Limestone Alps (with Flysch and Helvetic Nappes East of the Iller (Iller = Confluence of the River Danube))
- GEO 349: Eastern Alps, without Northern Limestone Alps (Central Alps)
- GEO 350: Southern Alps and Po Valley
- GEO 353: Molasse (Basin); Inner-Alpine Tertiary Basins; Quaternary Geology and Geomorphology of the Alps
- GEO 346: Western Alps; Southern Part (with Rhone Basin and Foothills of the Alps)
- GEO 332: Central and Northern Germany, Benelux: Geological Overviews
- GEO 355: Asia with Indian Ocean
- GEO 356: Africa; Arabian Peninsula (including the Red Sea); Canary Islands; Cape Verde Islands
- GEO 357: America; Greenland with Atlantic Ocean and Northern Arctic Sea
- GEO 358: Australia; New Zealand; Antarctica with Pacific Ocean
- GEO 331: Europe
- GEO 360: Tectonics
- GEO 370: Historical Geology; Stratigraphy and Paleontology
- GEO 372: Precambrian and Paleozoic Era
- GEO 375: Triassic
- GEO 376: Jurassic
- GEO 377: Cretaceous
- GEO 379: Tertiary
- GEO 380: Quaternary; River and Forest History; Studies of Bed Load (Transport)
- GEO 382: Paleoanthropology; Prehistory
- GEO 390: Paleozoology (Systematic; Ecological; Regional)
- GEO 392: Micropaleontology
- GEO 393: Invertebrate Paleontology
- GEO 394: Vertebrate Paleontology
- GEO 397: Paleobotany
- GEO 398: Paleoclimatology; Paleoenvironment Paleoecology; Paleogeography; Paleobiogeography
- GEO 399: Other
- GEO 372: Precambrian and Paleozoic Era
- GEO 400: Mineralogy (Comprehensive)
- GEO 401: Special Mineralogy (in General, incl. Classification Guide Books, Collections)
- GEO 402: Special Mineralogy (Species, Groups), without Gemstones
- GEO 403: Gemmology
- GEO 404: Archaeometry
- GEO 410: Methods of Mineralogical Research (in General)
- GEO 411: Mineral Optical Methods and Instruments (in General); Preparation
- GEO 412: Optical Methods – Transmitted Light Microscopy (Minerals, Rocks); Spindle Stage Method; Heavy Metal Analysis
- GEO 413: Optical Methods – Incident Light Microscopy
- GEO 414: Electro Microscopy; Electron-Probe Micro Analyzer; Cathodoluminescence
- GEO 415: Other Analytical Methods (including Infrared, DTA (Differential Thermal Analysis), Diffractometry
- GEO 401: Special Mineralogy (in General, incl. Classification Guide Books, Collections)
- GEO 420: Crystallography
- GEO 430: Geochemistry (in General: Earth Structure, Development of the Earthand Element Distribution), including Regional Geochemistry
- GEO 440: Petrology and Petrography of Crystalline Rock (in General)
- GEO 450: Systematic and General Geology of Mineral Deposits and Ecological Geology(excluding (Crude) Oil Geology and Coal Geology) (GEO 326)
- GEO 451: Geology of Ore / Mineral Deposits (in General)
- GEO 452: Specific Mineral Deposits
- GEO 453: Regional Geology of Ore / Mineral Deposits
- GEO 454: (Geophysical) Prospection and Evaluation of Deposits (Locating and Evaluation)
- GEO 455: Industrial Minerals (incl. Mineral Building Materials)
- GEO 456: Natural Stone; Ashlar Stone; Stone Conservation
- GEO 457: Glass; Ceramics; Synthetic Minerals; Refractory Materials
- GEO 458: Salts; Salt Deposits
- GEO 451: Geology of Ore / Mineral Deposits (in General)
- GEO 460: Mining
- GEO 470: Sedimentology and Sedimentpetrography
- GEO 471: Facies Analysis, Sedimentary Basin Analysis, Sequence Stratigraphy
- GEO 472: Mainland Sedimentation; Sedimentation of Rivers, Lakes; Glacial Sediments; Desert Studies
- GEO 473: Marine Sedimentation
- GEO 474: Fine-Grained Clastic Sediments (Clay, Pelite)
- GEO 475: Coarse Clastic Sediments (Sands, Gravel / Grit, Psammite, Psephite)
- GEO 476: Carbonates, Micro-Facies, Riffs
- GEO 477: Coal, Caustobiolith, Organic Substances in Sediments
- GEO 478: Geochemistry of Sediments, Geomicrobiology
- GEO 480: Diagenesis of Sediments
- GEO 471: Facies Analysis, Sedimentary Basin Analysis, Sequence Stratigraphy
- GEO 500: GeophysicsMathematical Geodesy, see BAU 560
- GEO 505: Fluctuations in Earth Rotation
- GEO 515: The Earth's Gravity / Gravitational FieldGeodetic Applications, see BAU 940
- GEO 525: Earth Tides
- GEO 505: Fluctuations in Earth Rotation
- GEO 530: Geomagnetism
- GEO 540: Geoelectricity; Magnetotellurics
- GEO 550: Seismology; Seismics
- GEO 560: Structure and Characteristics of the Earth's Interior
- GEO 570: Hydrospheric Physics
- GEO 600: Atmospheric Physics
- GEO 610: Atmospheric Optics
- GEO 620: Atmospheric Electricity
- GEO 640: Ionospheric Physics
- GEO 660: Magnetospheric Physics
- GEO 700: Meteorology
- GEO 710: General Planetary Circulation
- GEO 720: Winds
- GEO 723: Storms
- GEO 726: Hurricanes / Tornados
- GEO 730: Boundary Layer; Inversion Layers
- GEO 740: Water in the Atmosphere
- GEO 745: Cloud Physics
- GEO 750: Particles and Aerosols; Air Pollution (including Gas as Pollutants)Aerosols as Air Pollutants see UMW 221
- GEO 760: ClimatologyPaleoecology, Paleobiogeography see GEO 398
- GEO 763: Analytical Climatology (Structure of the Atmosphere, Emission, Temperature, Chemical Composition, ...)
- GEO 766: Synoptical Climatology (Typical Atmospheric Conditions, Fronts, Weather Charts, ...)
- GEO 769: Dynamical Climatology (Air-Pressure and Wind Belts, Weather Climatology, ...)
- GEO 772: Territorial Climate; Ground Climate; Microclimate
- GEO 773: Urban Climate
- GEO 775: Agroclimatology; PhenologyAgricultural Meterology, Forest Meteorology see also LAN 090
- GEO 778: Bioclimatology (Acclimatization, Healthy Climates, ....)
- GEO 780: Climate Change, Climate Fluctuation
- GEO 784: Regional Climatology (Climatic Regions)
- GEO 789: Other
- GEO 763: Analytical Climatology (Structure of the Atmosphere, Emission, Temperature, Chemical Composition, ...)
- GEO 790: Weather Analysis and Forecast
- GEO 799: Other
- GEO 710: General Planetary Circulation