Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 160 | 445 |
| aero. | Aeronáutica / Aviation | 249 | 515 |
| agr. | Agricultura / Agriculture, Aquaculture | 382 | 310 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 153 | 322 |
| anat. | Anatomía / Human Anatomy | 873 | 564 |
| armadura | Armadura / Historic Armour | 12 | 162 |
| armas | Armas / Weapons | 232 | 422 |
| arq. | Arquitectura / Architecture | 373 | 522 |
| arqueol. | Arqueología / Archaeology | 65 | 399 |
| arte | Arte / Art | 214 | 1288 |
| astron. | Astronomía / Astronomy | 236 | 680 |
| audio | Audiología / Audiology | 35 | 235 |
| automov. | Términos automovilísticos / Automotive Engineering | 407 | 539 |
| baile | Baile / Dance | 56 | 411 |
| bibl. | Bíblico / Biblical | 19 | 416 |
| biblio. | Biblioteconomía / Library Science | 15 | 206 |
| bici. | Bicicleta / Bicycle | 304 | 561 |
| biol. | Biología / Biology | 628 | 737 |
| bioquím. | Bioquímica / Biochemistry | 236 | 362 |
| biotec. | Biotecnología / Biotechnology | 11 | 312 |
| Bolsa | Bolsa / Stock Exchange | 62 | 278 |
| BomUrg | Bomberos & Urgencias / Firefighting & Rescue | 35 | 148 |
| bot. | Botánica, plantas / Botany, Plants | 947 | 442 |
| caza | Caza / Hunting | 48 | 137 |
| cerv. | Elaboración de cerveza / Brewing | 17 | 174 |
| ciencia | Ciencia / Academic Disciplines | 335 | 1757 |
| cine | Cine / Film | 200 | 1372 |
| comerc. | Comercio / Commerce | 469 | 576 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 28 | 382 |
| constr. | Construcción / Construction | 236 | 360 |
| conta. | Contabilidad / Accounting | 18 | 440 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 226 | 278 |
| dep. | Deporte / Sports | 915 | 1008 |
| drogas | Drogas / Drugs | 72 | 297 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 241 | 773 |
| econ. | Economía y dirección de empresas / Economy | 385 | 985 |
| edit. | Industria editorial / Publishing | 57 | 282 |
| edu. | Educación / Education | 372 | 1306 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 265 | 753 |
| enol. | Enología / Oenology | 52 | 133 |
| entom. | Entomología / Entomology | 121 | 119 |
| esot. | Esoterismo / Esotericism | 33 | 259 |
| espac. | Astronáutica y exploración espacial / Astronautics | 39 | 374 |
| espec. | Término especial / Specialized Term | 20 | 395 |
| estad. | Estadística / Statistics | 47 | 386 |
| etno. | Etnología / Ethnology | 458 | 299 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 191 | 864 |
| farm. | Farmacia / Pharmacy | 304 | 311 |
| ferro | Ferrocarril / Rail | 109 | 239 |
| filat. | Filatelia / Philately | 6 | 66 |
| filos. | Filosofía / Philosophy | 126 | 1031 |
| fin. | Finanzas / Finance | 438 | 619 |
| fís. | Física / Physics | 313 | 869 |
| fonét | Fonética / Phonetics | 14 | 450 |
| foto. | Fotografía / Photography | 48 | 871 |
| gastr. | Gastronomía / Gastronomy, Cooking | 2097 | 704 |
| geogr. | Geografía / Geography | 864 | 935 |
| geol. | Geología / Geology | 232 | 332 |
| heráld. | Heráldica / Heraldry | 3 | 121 |
| herram. | Herramientas / Tools | 310 | 539 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 65 | 120 |
| hipis. | Hipismo / Equestrianism, Horses | 90 | 140 |
| hist. | Historia / History | 420 | 1448 |
| hort. | Horticultura / Horticulture | 113 | 260 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 185 | 117 |
| ind | Industria / Industry | 106 | 543 |
| indum. | Indumentaria / Clothing, Fashion | 854 | 487 |
| ingen. | Ingeniería / Engineering | 41 | 1035 |
| inmue. | Inmuebles / Real Estate | 133 | 249 |
| internet | Internet / Internet | 146 | 1557 |
| juego | Juegos / Games | 133 | 984 |
| juguetes | Juguetes / Toys | 49 | 244 |
| jur. | Jurisprudencia / Law | 1029 | 633 |
| ling. | Lingüística / Linguistics | 575 | 1535 |
| lit. | Literatura / Literature | 333 | 1340 |
| loc. | Locución / Idiom | 26 | 708 |
| market. | Marketing / Marketing, Advertising | 34 | 574 |
| mat. | Matemáticas / Mathematics | 356 | 899 |
| material | Ciencia de materiales / Materials Science | 86 | 314 |
| med. | Medicina / Medicine | 2509 | 902 |
| meteo. | Meteorología / Meteorology | 309 | 251 |
| micol. | Micología / Mycology | 28 | 125 |
| mil. | Militar / Military | 407 | 447 |
| miner. | Minería / Mining & Drilling | 39 | 119 |
| mineral. | Mineralogía / Mineralogy | 82 | 166 |
| mitol. | Mitología / Mythology | 329 | 551 |
| moneda | Monedas / Currencies | 38 | 282 |
| mont. | Montañismo / Climbing, Mountaineering | 146 | 277 |
| mueb. | Muebles / Furniture | 227 | 249 |
| mús. | Música / Music | 469 | 1852 |
| náut. | Náutica / Nautical Science | 376 | 233 |
| neol. | Neologismos / Neologisms | 4 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 25 | 196 |
| odont. | Odontología / Dental Medicine | 148 | 138 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 128 |
| onomást. | Onomástica / Names of Persons | 26 | 244 |
| ópt | Óptica / Optics | 64 | 187 |
| orn. | Ornitología / Ornithology | 1385 | 163 |
| period. | Periodismo / Journalism | 68 | 477 |
| pol. | Política / Politics | 715 | 1072 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 1439 | 616 |
| proverb. | Proverbio / Proverb | 69 | 657 |
| psico. | Psicología / Psychology | 422 | 983 |
| quím. | Química / Chemistry | 818 | 599 |
| relig. | Religión / Religion | 724 | 733 |
| reloj | Relojes / Watches, Clocks | 27 | 217 |
| retór. | Retórica / Rhetoric | 7 | 433 |
| seguro | Seguro / Insurance | 42 | 181 |
| silv. | Silvicultura / Forestry | 65 | 184 |
| sociol. | Sociología / Sociology | 223 | 594 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 2653 | 18 |
| teatro | Teatro / Theatre | 122 | 532 |
| tec. | Tecnología / Technology | 493 | 1380 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 69 | 275 |
| telecom. | Telecomunicación / Telecommunications | 133 | 567 |
| textil | Textil / Textiles, Textile Industry | 169 | 169 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 440 | 1775 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 35 | 301 |
| trá. | Tráfico / Traffic | 229 | 342 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 230 | 366 |
| tur. | Turismo, hostelería / Travel Industry | 159 | 567 |
| TV | Televisión y radio / Radio and Television | 92 | 582 |
| UE | Unión Europea / European Union | 10 | 728 |
| unid. | Unidades de medida / Units, Measures, Weights | 72 | 458 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 4 | 290 |
| urban. | Urbanismo / Urban Planning | 123 | 260 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 61 | 177 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 51 | 736 |
| zool. | Zoología / Zoology, Animals | 1329 | 700 |
