Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 159 | 445 |
| aero. | Aeronáutica / Aviation | 244 | 513 |
| agr. | Agricultura / Agriculture, Aquaculture | 380 | 310 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 153 | 322 |
| anat. | Anatomía / Human Anatomy | 860 | 563 |
| armadura | Armadura / Historic Armour | 12 | 162 |
| armas | Armas / Weapons | 231 | 422 |
| arq. | Arquitectura / Architecture | 348 | 522 |
| arqueol. | Arqueología / Archaeology | 63 | 399 |
| arte | Arte / Art | 207 | 1288 |
| astron. | Astronomía / Astronomy | 233 | 679 |
| audio | Audiología / Audiology | 35 | 235 |
| automov. | Términos automovilísticos / Automotive Engineering | 391 | 539 |
| baile | Baile / Dance | 56 | 411 |
| bibl. | Bíblico / Biblical | 19 | 416 |
| biblio. | Biblioteconomía / Library Science | 14 | 206 |
| bici. | Bicicleta / Bicycle | 232 | 560 |
| biol. | Biología / Biology | 623 | 736 |
| bioquím. | Bioquímica / Biochemistry | 235 | 361 |
| biotec. | Biotecnología / Biotechnology | 11 | 312 |
| Bolsa | Bolsa / Stock Exchange | 62 | 278 |
| BomUrg | Bomberos & Urgencias / Firefighting & Rescue | 35 | 147 |
| bot. | Botánica, plantas / Botany, Plants | 947 | 442 |
| caza | Caza / Hunting | 48 | 137 |
| cerv. | Elaboración de cerveza / Brewing | 17 | 174 |
| ciencia | Ciencia / Academic Disciplines | 334 | 1755 |
| cine | Cine / Film | 200 | 1371 |
| comerc. | Comercio / Commerce | 466 | 576 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 28 | 382 |
| constr. | Construcción / Construction | 233 | 360 |
| conta. | Contabilidad / Accounting | 18 | 440 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 193 | 278 |
| dep. | Deporte / Sports | 905 | 1008 |
| drogas | Drogas / Drugs | 70 | 297 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 239 | 773 |
| econ. | Economía y dirección de empresas / Economy | 381 | 985 |
| edit. | Industria editorial / Publishing | 57 | 281 |
| edu. | Educación / Education | 371 | 1305 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 261 | 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 | 394 |
| estad. | Estadística / Statistics | 47 | 386 |
| etno. | Etnología / Ethnology | 456 | 299 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 191 | 863 |
| farm. | Farmacia / Pharmacy | 304 | 311 |
| ferro | Ferrocarril / Rail | 89 | 239 |
| filat. | Filatelia / Philately | 6 | 66 |
| filos. | Filosofía / Philosophy | 124 | 1029 |
| fin. | Finanzas / Finance | 436 | 619 |
| fís. | Física / Physics | 310 | 868 |
| fonét | Fonética / Phonetics | 14 | 450 |
| foto. | Fotografía / Photography | 48 | 869 |
| gastr. | Gastronomía / Gastronomy, Cooking | 2091 | 704 |
| geogr. | Geografía / Geography | 854 | 935 |
| geol. | Geología / Geology | 231 | 332 |
| heráld. | Heráldica / Heraldry | 3 | 121 |
| herram. | Herramientas / Tools | 291 | 539 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 65 | 119 |
| hipis. | Hipismo / Equestrianism, Horses | 89 | 140 |
| hist. | Historia / History | 410 | 1448 |
| hort. | Horticultura / Horticulture | 112 | 260 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 185 | 117 |
| ind | Industria / Industry | 106 | 543 |
| indum. | Indumentaria / Clothing, Fashion | 846 | 486 |
| ingen. | Ingeniería / Engineering | 38 | 1035 |
| inmue. | Inmuebles / Real Estate | 132 | 249 |
| internet | Internet / Internet | 107 | 1555 |
| juego | Juegos / Games | 101 | 984 |
| juguetes | Juguetes / Toys | 49 | 243 |
| jur. | Jurisprudencia / Law | 1018 | 632 |
| ling. | Lingüística / Linguistics | 571 | 1533 |
| lit. | Literatura / Literature | 331 | 1338 |
| loc. | Locución / Idiom | 26 | 708 |
| market. | Marketing / Marketing, Advertising | 34 | 574 |
| mat. | Matemáticas / Mathematics | 354 | 896 |
| material | Ciencia de materiales / Materials Science | 81 | 314 |
| med. | Medicina / Medicine | 2489 | 901 |
| meteo. | Meteorología / Meteorology | 303 | 251 |
| micol. | Micología / Mycology | 28 | 125 |
| mil. | Militar / Military | 406 | 447 |
| miner. | Minería / Mining & Drilling | 39 | 119 |
| mineral. | Mineralogía / Mineralogy | 82 | 165 |
| mitol. | Mitología / Mythology | 329 | 551 |
| moneda | Monedas / Currencies | 38 | 282 |
| mont. | Montañismo / Climbing, Mountaineering | 129 | 276 |
| mueb. | Muebles / Furniture | 214 | 249 |
| mús. | Música / Music | 468 | 1852 |
| náut. | Náutica / Nautical Science | 376 | 233 |
| neol. | Neologismos / Neologisms | 4 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 25 | 196 |
| odont. | Odontología / Dental Medicine | 127 | 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 | 1373 | 163 |
| period. | Periodismo / Journalism | 68 | 477 |
| pol. | Política / Politics | 699 | 1071 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 1419 | 616 |
| proverb. | Proverbio / Proverb | 69 | 657 |
| psico. | Psicología / Psychology | 417 | 982 |
| quím. | Química / Chemistry | 814 | 597 |
| relig. | Religión / Religion | 716 | 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 | 212 | 593 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 2640 | 18 |
| teatro | Teatro / Theatre | 122 | 532 |
| tec. | Tecnología / Technology | 480 | 1379 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 68 | 275 |
| telecom. | Telecomunicación / Telecommunications | 117 | 566 |
| textil | Textil / Textiles, Textile Industry | 166 | 169 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 341 | 1774 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 35 | 301 |
| trá. | Tráfico / Traffic | 227 | 341 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 122 | 366 |
| tur. | Turismo, hostelería / Travel Industry | 139 | 567 |
| TV | Televisión y radio / Radio and Television | 91 | 581 |
| UE | Unión Europea / European Union | 10 | 727 |
| unid. | Unidades de medida / Units, Measures, Weights | 70 | 457 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 4 | 290 |
| urban. | Urbanismo / Urban Planning | 122 | 259 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 60 | 177 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 49 | 736 |
| zool. | Zoología / Zoology, Animals | 1327 | 700 |
