Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 86 | 442 |
| aero. | Aeronáutica / Aviation | 194 | 509 |
| agr. | Agricultura / Agriculture, Aquaculture | 327 | 307 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 101 | 321 |
| anat. | Anatomía / Human Anatomy | 648 | 554 |
| armadura | Armadura / Historic Armour | 12 | 158 |
| armas | Armas / Weapons | 216 | 417 |
| arq. | Arquitectura / Architecture | 286 | 516 |
| arqueol. | Arqueología / Archaeology | 55 | 392 |
| arte | Arte / Art | 143 | 1271 |
| astron. | Astronomía / Astronomy | 203 | 670 |
| audio | Audiología / Audiology | 14 | 228 |
| automov. | Términos automovilísticos / Automotive Engineering | 256 | 533 |
| baile | Baile / Dance | 31 | 406 |
| bibl. | Bíblico / Biblical | 18 | 412 |
| biblio. | Biblioteconomía / Library Science | 8 | 204 |
| bici. | Bicicleta / Bicycle | 56 | 553 |
| biol. | Biología / Biology | 543 | 725 |
| bioquím. | Bioquímica / Biochemistry | 230 | 357 |
| biotec. | Biotecnología / Biotechnology | 9 | 308 |
| Bolsa | Bolsa / Stock Exchange | 46 | 276 |
| BomUrg | Bomberos & Urgencias / Firefighting & Rescue | 20 | 144 |
| bot. | Botánica, plantas / Botany, Plants | 883 | 434 |
| caza | Caza / Hunting | 39 | 136 |
| cerv. | Elaboración de cerveza / Brewing | 11 | 171 |
| ciencia | Ciencia / Academic Disciplines | 296 | 1728 |
| cine | Cine / Film | 155 | 1358 |
| comerc. | Comercio / Commerce | 317 | 574 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 27 | 375 |
| constr. | Construcción / Construction | 152 | 357 |
| conta. | Contabilidad / Accounting | 10 | 438 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 118 | 273 |
| dep. | Deporte / Sports | 553 | 1000 |
| drogas | Drogas / Drugs | 49 | 293 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 172 | 767 |
| econ. | Economía y dirección de empresas / Economy | 265 | 980 |
| edit. | Industria editorial / Publishing | 28 | 279 |
| edu. | Educación / Education | 214 | 1291 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 213 | 744 |
| enol. | Enología / Oenology | 38 | 130 |
| entom. | Entomología / Entomology | 113 | 115 |
| esot. | Esoterismo / Esotericism | 32 | 251 |
| espac. | Astronáutica y exploración espacial / Astronautics | 37 | 369 |
| espec. | Término especial / Specialized Term | 16 | 390 |
| estad. | Estadística / Statistics | 32 | 377 |
| etno. | Etnología / Ethnology | 429 | 294 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 177 | 850 |
| farm. | Farmacia / Pharmacy | 283 | 310 |
| ferro | Ferrocarril / Rail | 72 | 235 |
| filat. | Filatelia / Philately | 6 | 65 |
| filos. | Filosofía / Philosophy | 105 | 1016 |
| fin. | Finanzas / Finance | 239 | 615 |
| fís. | Física / Physics | 276 | 856 |
| fonét | Fonética / Phonetics | 13 | 441 |
| foto. | Fotografía / Photography | 43 | 859 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1630 | 694 |
| geogr. | Geografía / Geography | 733 | 922 |
| geol. | Geología / Geology | 191 | 328 |
| heráld. | Heráldica / Heraldry | 3 | 118 |
| herram. | Herramientas / Tools | 182 | 529 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 36 | 116 |
| hipis. | Hipismo / Equestrianism, Horses | 77 | 138 |
| hist. | Historia / History | 342 | 1423 |
| hort. | Horticultura / Horticulture | 94 | 256 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 165 | 116 |
| ind | Industria / Industry | 96 | 536 |
| indum. | Indumentaria / Clothing, Fashion | 403 | 477 |
| ingen. | Ingeniería / Engineering | 21 | 1018 |
| inmue. | Inmuebles / Real Estate | 73 | 248 |
| internet | Internet / Internet | 73 | 1537 |
| juego | Juegos / Games | 84 | 966 |
| juguetes | Juguetes / Toys | 46 | 241 |
| jur. | Jurisprudencia / Law | 549 | 621 |
| ling. | Lingüística / Linguistics | 491 | 1510 |
| lit. | Literatura / Literature | 251 | 1318 |
| loc. | Locución / Idiom | 27 | 708 |
| market. | Marketing / Marketing, Advertising | 23 | 573 |
| mat. | Matemáticas / Mathematics | 299 | 881 |
| material | Ciencia de materiales / Materials Science | 26 | 308 |
| med. | Medicina / Medicine | 2001 | 886 |
| meteo. | Meteorología / Meteorology | 224 | 243 |
| micol. | Micología / Mycology | 25 | 123 |
| mil. | Militar / Military | 323 | 443 |
| miner. | Minería / Mining & Drilling | 33 | 118 |
| mineral. | Mineralogía / Mineralogy | 69 | 162 |
| mitol. | Mitología / Mythology | 318 | 543 |
| moneda | Monedas / Currencies | 33 | 281 |
| mont. | Montañismo / Climbing, Mountaineering | 30 | 273 |
| mueb. | Muebles / Furniture | 128 | 244 |
| mús. | Música / Music | 388 | 1828 |
| náut. | Náutica / Nautical Science | 313 | 230 |
| neol. | Neologismos / Neologisms | 3 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 22 | 195 |
| odont. | Odontología / Dental Medicine | 61 | 137 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 128 |
| onomást. | Onomástica / Names of Persons | 26 | 237 |
| ópt | Óptica / Optics | 53 | 186 |
| orn. | Ornitología / Ornithology | 1258 | 159 |
| period. | Periodismo / Journalism | 52 | 471 |
| pol. | Política / Politics | 495 | 1060 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 1059 | 610 |
| proverb. | Proverbio / Proverb | 65 | 653 |
| psico. | Psicología / Psychology | 271 | 970 |
| quím. | Química / Chemistry | 784 | 589 |
| relig. | Religión / Religion | 650 | 725 |
| reloj | Relojes / Watches, Clocks | 24 | 215 |
| retór. | Retórica / Rhetoric | 4 | 428 |
| seguro | Seguro / Insurance | 20 | 180 |
| silv. | Silvicultura / Forestry | 49 | 181 |
| sociol. | Sociología / Sociology | 106 | 583 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 2406 | 17 |
| teatro | Teatro / Theatre | 84 | 523 |
| tec. | Tecnología / Technology | 295 | 1356 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 40 | 273 |
| telecom. | Telecomunicación / Telecommunications | 84 | 563 |
| textil | Textil / Textiles, Textile Industry | 106 | 168 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 220 | 1743 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 25 | 296 |
| trá. | Tráfico / Traffic | 105 | 339 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 82 | 363 |
| tur. | Turismo, hostelería / Travel Industry | 65 | 562 |
| TV | Televisión y radio / Radio and Television | 69 | 576 |
| UE | Unión Europea / European Union | 7 | 714 |
| unid. | Unidades de medida / Units, Measures, Weights | 68 | 454 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 3 | 284 |
| urban. | Urbanismo / Urban Planning | 92 | 254 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 47 | 176 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 15 | 728 |
| zool. | Zoología / Zoology, Animals | 1167 | 694 |
