Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 28 | 416 |
| aero. | Aeronáutica / Aviation | 100 | 465 |
| agr. | Agricultura / Agriculture, Aquaculture | 167 | 286 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 24 | 309 |
| anat. | Anatomía / Human Anatomy | 425 | 517 |
| armadura | Armadura / Historic Armour | 10 | 135 |
| armas | Armas / Weapons | 98 | 386 |
| arq. | Arquitectura / Architecture | 127 | 476 |
| arqueol. | Arqueología / Archaeology | 39 | 365 |
| arte | Arte / Art | 84 | 1185 |
| astron. | Astronomía / Astronomy | 96 | 605 |
| audio | Audiología / Audiology | 8 | 201 |
| automov. | Términos automovilísticos / Automotive Engineering | 70 | 496 |
| baile | Baile / Dance | 21 | 383 |
| bibl. | Bíblico / Biblical | 7 | 375 |
| biblio. | Biblioteconomía / Library Science | 4 | 187 |
| bici. | Bicicleta / Bicycle | 12 | 512 |
| biochem. | Bioquímica / Biochemistry | 50 | 324 |
| biol. | Biología / Biology | 257 | 673 |
| biotec. | Biotecnología / Biotechnology | 7 | 284 |
| Bolsa | Bolsa / Stock Exchange | 4 | 256 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 131 |
| bot. | Botánica, plantas / Botany, Plants | 595 | 406 |
| caza | Caza / Hunting | 15 | 131 |
| cerv. | Elaboración de cerveza / Brewing | 4 | 161 |
| ciencia | Ciencia / Academic Disciplines | 133 | 1583 |
| cine | Cine / Film | 91 | 1286 |
| comerc. | Comercio / Commerce | 126 | 552 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 26 | 352 |
| constr. | Construcción / Construction | 41 | 333 |
| conta. | Contabilidad / Accounting | 7 | 416 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 36 | 261 |
| dep. | Deporte / Sports | 301 | 949 |
| drogas | Drogas / Drugs | 31 | 262 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 37 | 721 |
| econ. | Economía y dirección de empresas / Economy | 75 | 915 |
| edit. | Industria editorial / Publishing | 10 | 256 |
| edu. | Educación / Education | 76 | 1203 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 83 | 687 |
| enol. | Enología / Oenology | 19 | 127 |
| entom. | Entomología / Entomology | 78 | 109 |
| esot. | Esoterismo / Esotericism | 25 | 236 |
| espac. | Astronáutica y exploración espacial / Astronautics | 21 | 335 |
| espec. | Término especial / Specialized Term | 3 | 358 |
| estad. | Estadística / Statistics | 5 | 339 |
| etno. | Etnología / Ethnology | 284 | 280 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 144 | 805 |
| farm. | Farmacia / Pharmacy | 52 | 292 |
| ferro | Ferrocarril / Rail | 23 | 217 |
| filat. | Filatelia / Philately | 2 | 63 |
| filos. | Filosofía / Philosophy | 43 | 940 |
| fin. | Finanzas / Finance | 78 | 585 |
| fís. | Física / Physics | 133 | 800 |
| fonét | Fonética / Phonetics | 9 | 403 |
| foto. | Fotografía / Photography | 25 | 820 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1086 | 657 |
| geogr. | Geografía / Geography | 478 | 853 |
| geol. | Geología / Geology | 90 | 295 |
| heráld. | Heráldica / Heraldry | 1 | 105 |
| herram. | Herramientas / Tools | 70 | 478 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 11 | 109 |
| hipis. | Hipismo / Equestrianism, Horses | 28 | 133 |
| hist. | Historia / History | 174 | 1312 |
| hort. | Horticultura / Horticulture | 35 | 245 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 130 | 111 |
| ind | Industria / Industry | 29 | 495 |
| indum. | Indumentaria / Clothing, Fashion | 205 | 452 |
| ingen. | Ingeniería / Engineering | 6 | 929 |
| inmue. | Inmuebles / Real Estate | 6 | 239 |
| internet | Internet / Internet | 25 | 1425 |
| juego | Juegos / Games | 41 | 881 |
| juguetes | Juguetes / Toys | 23 | 222 |
| jur. | Jurisprudencia / Law | 215 | 583 |
| ling. | Lingüística / Linguistics | 219 | 1396 |
| lit. | Literatura / Literature | 181 | 1218 |
| loc. | Locución / Idiom | 108 | 710 |
| market. | Marketing / Marketing, Advertising | 2 | 547 |
| mat. | Matemáticas / Mathematics | 122 | 802 |
| material | Ciencia de materiales / Materials Science | 9 | 282 |
| med. | Medicina / Medicine | 903 | 823 |
| meteo. | Meteorología / Meteorology | 102 | 224 |
| micol. | Micología / Mycology | 17 | 114 |
| mil. | Militar / Military | 154 | 402 |
| miner. | Minería / Mining & Drilling | 24 | 112 |
| mineral. | Mineralogía / Mineralogy | 47 | 151 |
| mitol. | Mitología / Mythology | 275 | 506 |
| moneda | Monedas / Currencies | 20 | 260 |
| mont. | Montañismo / Climbing, Mountaineering | 6 | 254 |
| mueb. | Muebles / Furniture | 63 | 231 |
| mús. | Música / Music | 247 | 1723 |
| náut. | Náutica / Nautical Science | 132 | 216 |
| neol. | Neologismos / Neologisms | 1 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 4 | 177 |
| odont. | Odontología / Dental Medicine | 29 | 130 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 130 |
| onomást. | Onomástica / Names of Persons | 8 | 217 |
| ópt | Óptica / Optics | 28 | 172 |
| orn. | Ornitología / Ornithology | 684 | 148 |
| period. | Periodismo / Journalism | 31 | 437 |
| pol. | Política / Politics | 195 | 973 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 488 | 580 |
| proverb. | Proverbio / Proverb | 61 | 610 |
| psico. | Psicología / Psychology | 71 | 903 |
| quím. | Química / Chemistry | 321 | 538 |
| relig. | Religión / Religion | 346 | 677 |
| reloj | Relojes / Watches, Clocks | 19 | 203 |
| seguro | Seguro / Insurance | 5 | 168 |
| silv. | Silvicultura / Forestry | 22 | 171 |
| sociol. | Sociología / Sociology | 25 | 533 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 1734 | 6 |
| teatro | Teatro / Theatre | 53 | 497 |
| tec. | Tecnología / Technology | 126 | 1227 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 5 | 250 |
| telecom. | Telecomunicación / Telecommunications | 22 | 532 |
| textil | Textil / Textiles, Textile Industry | 36 | 157 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 102 | 1616 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 17 | 276 |
| trá. | Tráfico / Traffic | 40 | 312 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 31 | 330 |
| tur. | Turismo, hostelería / Travel Industry | 30 | 530 |
| TV | Televisión y radio / Radio and Television | 31 | 552 |
| UE | Unión Europea / European Union | 3 | 664 |
| unid. | Unidades de medida / Units, Measures, Weights | 52 | 425 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 262 |
| urban. | Urbanismo / Urban Planning | 10 | 226 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 21 | 169 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 1 | 684 |
| zool. | Zoología / Zoology, Animals | 767 | 659 |
