Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 35 | 426 |
| aero. | Aeronáutica / Aviation | 140 | 477 |
| agr. | Agricultura / Agriculture, Aquaculture | 200 | 293 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 33 | 309 |
| anat. | Anatomía / Human Anatomy | 532 | 527 |
| armadura | Armadura / Historic Armour | 10 | 142 |
| armas | Armas / Weapons | 128 | 394 |
| arq. | Arquitectura / Architecture | 160 | 484 |
| arqueol. | Arqueología / Archaeology | 39 | 372 |
| arte | Arte / Art | 95 | 1197 |
| astron. | Astronomía / Astronomy | 122 | 620 |
| audio | Audiología / Audiology | 8 | 207 |
| automov. | Términos automovilísticos / Automotive Engineering | 107 | 505 |
| baile | Baile / Dance | 24 | 388 |
| bibl. | Bíblico / Biblical | 10 | 384 |
| biblio. | Biblioteconomía / Library Science | 4 | 193 |
| bici. | Bicicleta / Bicycle | 17 | 523 |
| biochem. | Bioquímica / Biochemistry | 57 | 333 |
| biol. | Biología / Biology | 315 | 688 |
| biotec. | Biotecnología / Biotechnology | 7 | 291 |
| Bolsa | Bolsa / Stock Exchange | 7 | 262 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 132 |
| bot. | Botánica, plantas / Botany, Plants | 667 | 411 |
| caza | Caza / Hunting | 16 | 132 |
| cerv. | Elaboración de cerveza / Brewing | 5 | 164 |
| ciencia | Ciencia / Academic Disciplines | 140 | 1621 |
| cine | Cine / Film | 118 | 1299 |
| comerc. | Comercio / Commerce | 169 | 558 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 26 | 358 |
| constr. | Construcción / Construction | 62 | 338 |
| conta. | Contabilidad / Accounting | 7 | 419 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 73 | 265 |
| dep. | Deporte / Sports | 379 | 966 |
| drogas | Drogas / Drugs | 35 | 271 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 42 | 734 |
| econ. | Economía y dirección de empresas / Economy | 97 | 931 |
| edit. | Industria editorial / Publishing | 10 | 263 |
| edu. | Educación / Education | 100 | 1234 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 109 | 697 |
| enol. | Enología / Oenology | 21 | 127 |
| entom. | Entomología / Entomology | 86 | 109 |
| esot. | Esoterismo / Esotericism | 27 | 241 |
| espac. | Astronáutica y exploración espacial / Astronautics | 23 | 342 |
| espec. | Término especial / Specialized Term | 4 | 368 |
| estad. | Estadística / Statistics | 6 | 351 |
| etno. | Etnología / Ethnology | 341 | 282 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 145 | 816 |
| farm. | Farmacia / Pharmacy | 115 | 293 |
| ferro | Ferrocarril / Rail | 27 | 220 |
| filat. | Filatelia / Philately | 6 | 63 |
| filos. | Filosofía / Philosophy | 59 | 960 |
| fin. | Finanzas / Finance | 113 | 592 |
| fís. | Física / Physics | 183 | 811 |
| fonét | Fonética / Phonetics | 9 | 411 |
| foto. | Fotografía / Photography | 28 | 831 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1346 | 671 |
| geogr. | Geografía / Geography | 558 | 876 |
| geol. | Geología / Geology | 110 | 302 |
| heráld. | Heráldica / Heraldry | 2 | 107 |
| herram. | Herramientas / Tools | 99 | 491 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 15 | 109 |
| hipis. | Hipismo / Equestrianism, Horses | 55 | 132 |
| hist. | Historia / History | 229 | 1340 |
| hort. | Horticultura / Horticulture | 50 | 249 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 145 | 113 |
| ind | Industria / Industry | 45 | 507 |
| indum. | Indumentaria / Clothing, Fashion | 263 | 459 |
| ingen. | Ingeniería / Engineering | 9 | 946 |
| inmue. | Inmuebles / Real Estate | 6 | 241 |
| internet | Internet / Internet | 37 | 1462 |
| juego | Juegos / Games | 61 | 905 |
| juguetes | Juguetes / Toys | 28 | 227 |
| jur. | Jurisprudencia / Law | 276 | 593 |
| ling. | Lingüística / Linguistics | 356 | 1426 |
| lit. | Literatura / Literature | 191 | 1250 |
| loc. | Locución / Idiom | 108 | 709 |
| market. | Marketing / Marketing, Advertising | 2 | 553 |
| mat. | Matemáticas / Mathematics | 159 | 821 |
| material | Ciencia de materiales / Materials Science | 14 | 289 |
| med. | Medicina / Medicine | 1216 | 845 |
| meteo. | Meteorología / Meteorology | 128 | 228 |
| micol. | Micología / Mycology | 24 | 114 |
| mil. | Militar / Military | 194 | 411 |
| miner. | Minería / Mining & Drilling | 25 | 113 |
| mineral. | Mineralogía / Mineralogy | 54 | 153 |
| mitol. | Mitología / Mythology | 286 | 514 |
| moneda | Monedas / Currencies | 23 | 263 |
| mont. | Montañismo / Climbing, Mountaineering | 7 | 259 |
| mueb. | Muebles / Furniture | 84 | 234 |
| mús. | Música / Music | 302 | 1748 |
| náut. | Náutica / Nautical Science | 216 | 219 |
| neol. | Neologismos / Neologisms | 3 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 4 | 182 |
| odont. | Odontología / Dental Medicine | 38 | 132 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 129 |
| onomást. | Onomástica / Names of Persons | 9 | 221 |
| ópt | Óptica / Optics | 30 | 173 |
| orn. | Ornitología / Ornithology | 890 | 150 |
| period. | Periodismo / Journalism | 33 | 446 |
| pol. | Política / Politics | 241 | 999 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 690 | 589 |
| proverb. | Proverbio / Proverb | 61 | 623 |
| psico. | Psicología / Psychology | 133 | 919 |
| quím. | Química / Chemistry | 377 | 550 |
| relig. | Religión / Religion | 496 | 692 |
| reloj | Relojes / Watches, Clocks | 22 | 206 |
| seguro | Seguro / Insurance | 5 | 172 |
| silv. | Silvicultura / Forestry | 33 | 173 |
| sociol. | Sociología / Sociology | 29 | 547 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 1799 | 9 |
| teatro | Teatro / Theatre | 71 | 502 |
| tec. | Tecnología / Technology | 148 | 1258 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 6 | 257 |
| telecom. | Telecomunicación / Telecommunications | 53 | 544 |
| textil | Textil / Textiles, Textile Industry | 46 | 159 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 139 | 1647 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 17 | 280 |
| trá. | Tráfico / Traffic | 50 | 324 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 39 | 340 |
| tur. | Turismo, hostelería / Travel Industry | 34 | 538 |
| TV | Televisión y radio / Radio and Television | 48 | 562 |
| UE | Unión Europea / European Union | 3 | 679 |
| unid. | Unidades de medida / Units, Measures, Weights | 66 | 433 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 267 |
| urban. | Urbanismo / Urban Planning | 11 | 231 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 28 | 169 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 2 | 701 |
| zool. | Zoología / Zoology, Animals | 868 | 667 |
