Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 28 | 419 |
| aero. | Aeronáutica / Aviation | 101 | 465 |
| agr. | Agricultura / Agriculture, Aquaculture | 171 | 290 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 24 | 309 |
| anat. | Anatomía / Human Anatomy | 437 | 520 |
| armadura | Armadura / Historic Armour | 10 | 139 |
| armas | Armas / Weapons | 103 | 388 |
| arq. | Arquitectura / Architecture | 131 | 481 |
| arqueol. | Arqueología / Archaeology | 39 | 368 |
| arte | Arte / Art | 84 | 1190 |
| astron. | Astronomía / Astronomy | 99 | 607 |
| audio | Audiología / Audiology | 8 | 202 |
| automov. | Términos automovilísticos / Automotive Engineering | 79 | 498 |
| baile | Baile / Dance | 21 | 385 |
| bibl. | Bíblico / Biblical | 7 | 380 |
| biblio. | Biblioteconomía / Library Science | 4 | 189 |
| bici. | Bicicleta / Bicycle | 13 | 514 |
| biochem. | Bioquímica / Biochemistry | 50 | 327 |
| biol. | Biología / Biology | 269 | 678 |
| biotec. | Biotecnología / Biotechnology | 7 | 285 |
| Bolsa | Bolsa / Stock Exchange | 4 | 257 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 131 |
| bot. | Botánica, plantas / Botany, Plants | 622 | 406 |
| caza | Caza / Hunting | 15 | 131 |
| cerv. | Elaboración de cerveza / Brewing | 4 | 163 |
| ciencia | Ciencia / Academic Disciplines | 134 | 1596 |
| cine | Cine / Film | 93 | 1291 |
| comerc. | Comercio / Commerce | 134 | 554 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 26 | 355 |
| constr. | Construcción / Construction | 44 | 335 |
| conta. | Contabilidad / Accounting | 7 | 416 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 43 | 263 |
| dep. | Deporte / Sports | 319 | 954 |
| drogas | Drogas / Drugs | 32 | 263 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 37 | 724 |
| econ. | Economía y dirección de empresas / Economy | 79 | 917 |
| edit. | Industria editorial / Publishing | 10 | 258 |
| edu. | Educación / Education | 89 | 1210 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 87 | 687 |
| enol. | Enología / Oenology | 19 | 127 |
| entom. | Entomología / Entomology | 80 | 109 |
| esot. | Esoterismo / Esotericism | 25 | 236 |
| espac. | Astronáutica y exploración espacial / Astronautics | 21 | 335 |
| espec. | Término especial / Specialized Term | 4 | 359 |
| estad. | Estadística / Statistics | 5 | 340 |
| etno. | Etnología / Ethnology | 298 | 283 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 144 | 807 |
| farm. | Farmacia / Pharmacy | 54 | 292 |
| ferro | Ferrocarril / Rail | 23 | 217 |
| filat. | Filatelia / Philately | 2 | 63 |
| filos. | Filosofía / Philosophy | 49 | 948 |
| fin. | Finanzas / Finance | 95 | 587 |
| fís. | Física / Physics | 133 | 802 |
| fonét | Fonética / Phonetics | 9 | 404 |
| foto. | Fotografía / Photography | 25 | 825 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1135 | 662 |
| geogr. | Geografía / Geography | 493 | 858 |
| geol. | Geología / Geology | 96 | 295 |
| heráld. | Heráldica / Heraldry | 1 | 105 |
| herram. | Herramientas / Tools | 75 | 479 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 12 | 109 |
| hipis. | Hipismo / Equestrianism, Horses | 35 | 133 |
| hist. | Historia / History | 203 | 1322 |
| hort. | Horticultura / Horticulture | 38 | 247 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 131 | 112 |
| ind | Industria / Industry | 32 | 497 |
| indum. | Indumentaria / Clothing, Fashion | 221 | 457 |
| ingen. | Ingeniería / Engineering | 6 | 934 |
| inmue. | Inmuebles / Real Estate | 6 | 240 |
| internet | Internet / Internet | 25 | 1436 |
| juego | Juegos / Games | 46 | 890 |
| juguetes | Juguetes / Toys | 25 | 223 |
| jur. | Jurisprudencia / Law | 225 | 586 |
| ling. | Lingüística / Linguistics | 236 | 1405 |
| lit. | Literatura / Literature | 181 | 1229 |
| loc. | Locución / Idiom | 108 | 710 |
| market. | Marketing / Marketing, Advertising | 2 | 548 |
| mat. | Matemáticas / Mathematics | 127 | 804 |
| material | Ciencia de materiales / Materials Science | 9 | 283 |
| med. | Medicina / Medicine | 936 | 829 |
| meteo. | Meteorología / Meteorology | 108 | 224 |
| micol. | Micología / Mycology | 18 | 114 |
| mil. | Militar / Military | 160 | 404 |
| miner. | Minería / Mining & Drilling | 24 | 113 |
| mineral. | Mineralogía / Mineralogy | 47 | 151 |
| mitol. | Mitología / Mythology | 277 | 510 |
| moneda | Monedas / Currencies | 22 | 261 |
| mont. | Montañismo / Climbing, Mountaineering | 6 | 256 |
| mueb. | Muebles / Furniture | 66 | 231 |
| mús. | Música / Music | 263 | 1728 |
| náut. | Náutica / Nautical Science | 139 | 217 |
| neol. | Neologismos / Neologisms | 3 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 4 | 178 |
| odont. | Odontología / Dental Medicine | 29 | 130 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 130 |
| onomást. | Onomástica / Names of Persons | 8 | 219 |
| ópt | Óptica / Optics | 28 | 172 |
| orn. | Ornitología / Ornithology | 697 | 148 |
| period. | Periodismo / Journalism | 31 | 442 |
| pol. | Política / Politics | 206 | 978 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 518 | 582 |
| proverb. | Proverbio / Proverb | 61 | 614 |
| psico. | Psicología / Psychology | 76 | 909 |
| quím. | Química / Chemistry | 332 | 543 |
| relig. | Religión / Religion | 385 | 682 |
| reloj | Relojes / Watches, Clocks | 20 | 205 |
| seguro | Seguro / Insurance | 5 | 169 |
| silv. | Silvicultura / Forestry | 23 | 171 |
| sociol. | Sociología / Sociology | 26 | 537 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 1740 | 6 |
| teatro | Teatro / Theatre | 56 | 499 |
| tec. | Tecnología / Technology | 133 | 1232 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 5 | 250 |
| telecom. | Telecomunicación / Telecommunications | 24 | 534 |
| textil | Textil / Textiles, Textile Industry | 37 | 158 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 108 | 1626 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 17 | 277 |
| trá. | Tráfico / Traffic | 42 | 314 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 31 | 331 |
| tur. | Turismo, hostelería / Travel Industry | 30 | 531 |
| TV | Televisión y radio / Radio and Television | 34 | 554 |
| UE | Unión Europea / European Union | 3 | 668 |
| unid. | Unidades de medida / Units, Measures, Weights | 58 | 427 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 263 |
| urban. | Urbanismo / Urban Planning | 10 | 228 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 21 | 170 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 1 | 688 |
| zool. | Zoología / Zoology, Animals | 791 | 662 |
