Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 59 | 433 |
| aero. | Aeronáutica / Aviation | 168 | 498 |
| agr. | Agricultura / Agriculture, Aquaculture | 254 | 304 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 73 | 316 |
| anat. | Anatomía / Human Anatomy | 581 | 544 |
| armadura | Armadura / Historic Armour | 10 | 151 |
| armas | Armas / Weapons | 196 | 412 |
| arq. | Arquitectura / Architecture | 204 | 508 |
| arqueol. | Arqueología / Archaeology | 46 | 387 |
| arte | Arte / Art | 115 | 1245 |
| astron. | Astronomía / Astronomy | 156 | 653 |
| audio | Audiología / Audiology | 13 | 219 |
| automov. | Términos automovilísticos / Automotive Engineering | 137 | 520 |
| baile | Baile / Dance | 28 | 400 |
| bibl. | Bíblico / Biblical | 18 | 401 |
| biblio. | Biblioteconomía / Library Science | 8 | 201 |
| bici. | Bicicleta / Bicycle | 40 | 539 |
| biochem. | Bioquímica / Biochemistry | 208 | 349 |
| biol. | Biología / Biology | 444 | 714 |
| biotec. | Biotecnología / Biotechnology | 8 | 303 |
| Bolsa | Bolsa / Stock Exchange | 10 | 270 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 10 | 138 |
| bot. | Botánica, plantas / Botany, Plants | 772 | 425 |
| caza | Caza / Hunting | 31 | 136 |
| cerv. | Elaboración de cerveza / Brewing | 8 | 169 |
| ciencia | Ciencia / Academic Disciplines | 203 | 1692 |
| cine | Cine / Film | 138 | 1336 |
| comerc. | Comercio / Commerce | 214 | 566 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 26 | 369 |
| constr. | Construcción / Construction | 103 | 353 |
| conta. | Contabilidad / Accounting | 10 | 431 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 89 | 269 |
| dep. | Deporte / Sports | 493 | 985 |
| drogas | Drogas / Drugs | 45 | 284 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 90 | 757 |
| econ. | Economía y dirección de empresas / Economy | 167 | 960 |
| edit. | Industria editorial / Publishing | 25 | 272 |
| edu. | Educación / Education | 151 | 1273 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 138 | 728 |
| enol. | Enología / Oenology | 34 | 129 |
| entom. | Entomología / Entomology | 103 | 112 |
| esot. | Esoterismo / Esotericism | 29 | 247 |
| espac. | Astronáutica y exploración espacial / Astronautics | 33 | 359 |
| espec. | Término especial / Specialized Term | 7 | 382 |
| estad. | Estadística / Statistics | 17 | 372 |
| etno. | Etnología / Ethnology | 405 | 289 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 177 | 837 |
| farm. | Farmacia / Pharmacy | 259 | 301 |
| ferro | Ferrocarril / Rail | 53 | 226 |
| filat. | Filatelia / Philately | 6 | 65 |
| filos. | Filosofía / Philosophy | 77 | 996 |
| fin. | Finanzas / Finance | 170 | 606 |
| fís. | Física / Physics | 236 | 840 |
| fonét | Fonética / Phonetics | 12 | 431 |
| foto. | Fotografía / Photography | 34 | 853 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1480 | 684 |
| geogr. | Geografía / Geography | 624 | 905 |
| geol. | Geología / Geology | 142 | 321 |
| heráld. | Heráldica / Heraldry | 2 | 115 |
| herram. | Herramientas / Tools | 144 | 518 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 23 | 114 |
| hipis. | Hipismo / Equestrianism, Horses | 70 | 135 |
| hist. | Historia / History | 293 | 1392 |
| hort. | Horticultura / Horticulture | 71 | 253 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 153 | 115 |
| ind | Industria / Industry | 77 | 525 |
| indum. | Indumentaria / Clothing, Fashion | 333 | 471 |
| ingen. | Ingeniería / Engineering | 17 | 988 |
| inmue. | Inmuebles / Real Estate | 26 | 244 |
| internet | Internet / Internet | 52 | 1514 |
| juego | Juegos / Games | 80 | 946 |
| juguetes | Juguetes / Toys | 36 | 234 |
| jur. | Jurisprudencia / Law | 377 | 615 |
| ling. | Lingüística / Linguistics | 446 | 1477 |
| lit. | Literatura / Literature | 236 | 1293 |
| loc. | Locución / Idiom | 56 | 708 |
| market. | Marketing / Marketing, Advertising | 4 | 563 |
| mat. | Matemáticas / Mathematics | 249 | 859 |
| material | Ciencia de materiales / Materials Science | 14 | 302 |
| med. | Medicina / Medicine | 1558 | 874 |
| meteo. | Meteorología / Meteorology | 179 | 241 |
| micol. | Micología / Mycology | 24 | 120 |
| mil. | Militar / Military | 259 | 436 |
| miner. | Minería / Mining & Drilling | 28 | 116 |
| mineral. | Mineralogía / Mineralogy | 62 | 160 |
| mitol. | Mitología / Mythology | 305 | 535 |
| moneda | Monedas / Currencies | 32 | 273 |
| mont. | Montañismo / Climbing, Mountaineering | 22 | 269 |
| mueb. | Muebles / Furniture | 106 | 239 |
| mús. | Música / Music | 347 | 1799 |
| náut. | Náutica / Nautical Science | 267 | 227 |
| neol. | Neologismos / Neologisms | 3 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 12 | 190 |
| odont. | Odontología / Dental Medicine | 52 | 136 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 128 |
| onomást. | Onomástica / Names of Persons | 26 | 231 |
| ópt | Óptica / Optics | 34 | 182 |
| orn. | Ornitología / Ornithology | 1037 | 155 |
| period. | Periodismo / Journalism | 39 | 462 |
| pol. | Política / Politics | 365 | 1033 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 891 | 599 |
| proverb. | Proverbio / Proverb | 62 | 642 |
| psico. | Psicología / Psychology | 210 | 952 |
| quím. | Química / Chemistry | 473 | 574 |
| relig. | Religión / Religion | 583 | 710 |
| reloj | Relojes / Watches, Clocks | 23 | 213 |
| retór. | Retórica / Rhetoric | 2 | 421 |
| seguro | Seguro / Insurance | 11 | 178 |
| silv. | Silvicultura / Forestry | 40 | 181 |
| sociol. | Sociología / Sociology | 58 | 571 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 2046 | 15 |
| teatro | Teatro / Theatre | 78 | 516 |
| tec. | Tecnología / Technology | 190 | 1324 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 26 | 268 |
| telecom. | Telecomunicación / Telecommunications | 65 | 554 |
| textil | Textil / Textiles, Textile Industry | 71 | 165 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 173 | 1705 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 20 | 289 |
| trá. | Tráfico / Traffic | 69 | 336 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 47 | 357 |
| tur. | Turismo, hostelería / Travel Industry | 44 | 552 |
| TV | Televisión y radio / Radio and Television | 61 | 571 |
| UE | Unión Europea / European Union | 4 | 694 |
| unid. | Unidades de medida / Units, Measures, Weights | 66 | 446 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 276 |
| urban. | Urbanismo / Urban Planning | 55 | 245 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 35 | 173 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 5 | 720 |
| zool. | Zoología / Zoology, Animals | 1024 | 683 |
