Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 19 | 409 |
| aero. | Aeronáutica / Aviation | 87 | 452 |
| agr. | Agricultura / Agriculture, Aquaculture | 143 | 278 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 20 | 305 |
| anat. | Anatomía / Human Anatomy | 337 | 510 |
| armadura | Armadura / Historic Armour | 9 | 130 |
| armas | Armas / Weapons | 66 | 382 |
| arq. | Arquitectura / Architecture | 114 | 471 |
| arqueol. | Arqueología / Archaeology | 32 | 361 |
| arte | Arte / Art | 55 | 1168 |
| astron. | Astronomía / Astronomy | 78 | 591 |
| audio | Audiología / Audiology | 6 | 195 |
| automov. | Términos automovilísticos / Automotive Engineering | 59 | 484 |
| baile | Baile / Dance | 21 | 382 |
| bibl. | Bíblico / Biblical | 7 | 369 |
| biblio. | Biblioteconomía / Library Science | 4 | 182 |
| bici. | Bicicleta / Bicycle | 10 | 502 |
| biochem. | Bioquímica / Biochemistry | 47 | 320 |
| biol. | Biología / Biology | 213 | 660 |
| biotec. | Biotecnología / Biotechnology | 6 | 280 |
| Bolsa | Bolsa / Stock Exchange | 4 | 253 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 128 |
| bot. | Botánica, plantas / Botany, Plants | 564 | 399 |
| caza | Caza / Hunting | 11 | 130 |
| cerv. | Elaboración de cerveza / Brewing | 3 | 160 |
| ciencia | Ciencia / Academic Disciplines | 102 | 1549 |
| cine | Cine / Film | 72 | 1275 |
| comerc. | Comercio / Commerce | 101 | 542 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 9 | 349 |
| constr. | Construcción / Construction | 25 | 324 |
| conta. | Contabilidad / Accounting | 4 | 411 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 29 | 256 |
| dep. | Deporte / Sports | 260 | 936 |
| drogas | Drogas / Drugs | 31 | 260 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 33 | 704 |
| econ. | Economía y dirección de empresas / Economy | 64 | 901 |
| edit. | Industria editorial / Publishing | 10 | 254 |
| edu. | Educación / Education | 64 | 1189 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 80 | 671 |
| enol. | Enología / Oenology | 10 | 126 |
| entom. | Entomología / Entomology | 71 | 105 |
| esot. | Esoterismo / Esotericism | 7 | 230 |
| espac. | Astronáutica y exploración espacial / Astronautics | 18 | 321 |
| espec. | Término especial / Specialized Term | 3 | 353 |
| estad. | Estadística / Statistics | 5 | 332 |
| etno. | Etnología / Ethnology | 261 | 269 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 42 | 792 |
| farm. | Farmacia / Pharmacy | 45 | 288 |
| ferro | Ferrocarril / Rail | 23 | 214 |
| filos. | Filosofía / Philosophy | 26 | 919 |
| fin. | Finanzas / Finance | 59 | 575 |
| fís. | Física / Physics | 101 | 785 |
| fonét | Fonética / Phonetics | 9 | 397 |
| foto. | Fotografía / Photography | 23 | 810 |
| gastr. | Gastronomía / Gastronomy, Cooking | 998 | 645 |
| geogr. | Geografía / Geography | 443 | 834 |
| geol. | Geología / Geology | 79 | 288 |
| heráld. | Heráldica / Heraldry | 1 | 100 |
| herram. | Herramientas / Tools | 52 | 471 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 11 | 108 |
| hipis. | Hipismo / Equestrianism, Horses | 24 | 131 |
| hist. | Historia / History | 160 | 1296 |
| hort. | Horticultura / Horticulture | 31 | 240 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 98 | 110 |
| ind | Industria / Industry | 27 | 485 |
| indum. | Indumentaria / Clothing, Fashion | 180 | 446 |
| ingen. | Ingeniería / Engineering | 5 | 911 |
| inmue. | Inmuebles / Real Estate | 3 | 238 |
| internet | Internet / Internet | 18 | 1406 |
| juego | Juegos / Games | 32 | 865 |
| juguetes | Juguetes / Toys | 23 | 217 |
| jur. | Jurisprudencia / Law | 177 | 581 |
| ling. | Lingüística / Linguistics | 186 | 1369 |
| lit. | Literatura / Literature | 84 | 1196 |
| loc. | Locución / Idiom | 108 | 710 |
| market. | Marketing / Marketing, Advertising | 2 | 541 |
| mat. | Matemáticas / Mathematics | 101 | 786 |
| material | Ciencia de materiales / Materials Science | 6 | 275 |
| med. | Medicina / Medicine | 695 | 811 |
| meteo. | Meteorología / Meteorology | 82 | 220 |
| micol. | Micología / Mycology | 16 | 113 |
| mil. | Militar / Military | 135 | 397 |
| miner. | Minería / Mining & Drilling | 23 | 110 |
| mineral. | Mineralogía / Mineralogy | 44 | 148 |
| mitol. | Mitología / Mythology | 270 | 495 |
| moneda | Monedas / Currencies | 19 | 255 |
| mont. | Montañismo / Climbing, Mountaineering | 6 | 251 |
| mueb. | Muebles / Furniture | 53 | 228 |
| mús. | Música / Music | 236 | 1699 |
| náut. | Náutica / Nautical Science | 116 | 212 |
| neol. | Neologismos / Neologisms | 1 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 4 | 174 |
| odont. | Odontología / Dental Medicine | 27 | 129 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 130 |
| onomást. | Onomástica / Names of Persons | 1 | 213 |
| ópt | Óptica / Optics | 24 | 167 |
| orn. | Ornitología / Ornithology | 641 | 146 |
| period. | Periodismo / Journalism | 30 | 431 |
| pol. | Política / Politics | 154 | 958 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 402 | 573 |
| proverb. | Proverbio / Proverb | 61 | 601 |
| psico. | Psicología / Psychology | 56 | 893 |
| quím. | Química / Chemistry | 300 | 530 |
| relig. | Religión / Religion | 272 | 668 |
| reloj | Relojes / Watches, Clocks | 17 | 201 |
| seguro | Seguro / Insurance | 4 | 166 |
| silv. | Silvicultura / Forestry | 19 | 166 |
| sociol. | Sociología / Sociology | 15 | 525 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 1665 | 1 |
| teatro | Teatro / Theatre | 44 | 491 |
| tec. | Tecnología / Technology | 107 | 1202 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 5 | 246 |
| telecom. | Telecomunicación / Telecommunications | 17 | 526 |
| textil | Textil / Textiles, Textile Industry | 33 | 154 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 88 | 1579 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 15 | 273 |
| trá. | Tráfico / Traffic | 37 | 307 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 26 | 322 |
| tur. | Turismo, hostelería / Travel Industry | 23 | 521 |
| TV | Televisión y radio / Radio and Television | 27 | 544 |
| UE | Unión Europea / European Union | 3 | 653 |
| unid. | Unidades de medida / Units, Measures, Weights | 49 | 421 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 260 |
| urban. | Urbanismo / Urban Planning | 7 | 222 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 16 | 166 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 1 | 677 |
| zool. | Zoología / Zoology, Animals | 720 | 654 |
