Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 17 | 404 |
| aero. | Aeronáutica / Aviation | 85 | 449 |
| agr. | Agricultura / Agriculture, Aquaculture | 139 | 274 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 15 | 302 |
| anat. | Anatomía / Human Anatomy | 332 | 503 |
| armadura | Armadura / Historic Armour | 9 | 128 |
| armas | Armas / Weapons | 65 | 379 |
| arq. | Arquitectura / Architecture | 111 | 466 |
| arqueol. | Arqueología / Archaeology | 31 | 354 |
| arte | Arte / Art | 52 | 1157 |
| astron. | Astronomía / Astronomy | 78 | 585 |
| audio | Audiología / Audiology | 6 | 194 |
| automov. | Términos automovilísticos / Automotive Engineering | 49 | 480 |
| baile | Baile / Dance | 20 | 380 |
| bibl. | Bíblico / Biblical | 7 | 365 |
| biblio. | Biblioteconomía / Library Science | 4 | 181 |
| bici. | Bicicleta / Bicycle | 10 | 497 |
| biochem. | Bioquímica / Biochemistry | 47 | 317 |
| biol. | Biología / Biology | 209 | 655 |
| biotec. | Biotecnología / Biotechnology | 4 | 277 |
| Bolsa | Bolsa / Stock Exchange | 3 | 251 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 126 |
| bot. | Botánica, plantas / Botany, Plants | 549 | 397 |
| caza | Caza / Hunting | 10 | 129 |
| cerv. | Elaboración de cerveza / Brewing | 3 | 159 |
| ciencia | Ciencia / Academic Disciplines | 94 | 1534 |
| cine | Cine / Film | 56 | 1268 |
| comerc. | Comercio / Commerce | 87 | 538 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 9 | 346 |
| constr. | Construcción / Construction | 24 | 323 |
| conta. | Contabilidad / Accounting | 3 | 404 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 29 | 253 |
| dep. | Deporte / Sports | 243 | 931 |
| drogas | Drogas / Drugs | 31 | 256 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 32 | 700 |
| econ. | Economía y dirección de empresas / Economy | 59 | 893 |
| edit. | Industria editorial / Publishing | 10 | 251 |
| edu. | Educación / Education | 62 | 1179 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 79 | 666 |
| enol. | Enología / Oenology | 10 | 124 |
| entom. | Entomología / Entomology | 71 | 103 |
| esot. | Esoterismo / Esotericism | 7 | 229 |
| espac. | Astronáutica y exploración espacial / Astronautics | 17 | 319 |
| espec. | Término especial / Specialized Term | 3 | 350 |
| estad. | Estadística / Statistics | 4 | 325 |
| etno. | Etnología / Ethnology | 260 | 267 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 18 | 787 |
| farm. | Farmacia / Pharmacy | 37 | 285 |
| ferro | Ferrocarril / Rail | 22 | 213 |
| filos. | Filosofía / Philosophy | 17 | 910 |
| fin. | Finanzas / Finance | 53 | 571 |
| fís. | Física / Physics | 99 | 779 |
| fonét | Fonética / Phonetics | 9 | 392 |
| foto. | Fotografía / Photography | 22 | 805 |
| gastr. | Gastronomía / Gastronomy, Cooking | 955 | 640 |
| geogr. | Geografía / Geography | 439 | 821 |
| geol. | Geología / Geology | 75 | 283 |
| heráld. | Heráldica / Heraldry | 1 | 98 |
| herram. | Herramientas / Tools | 50 | 467 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 11 | 106 |
| hipis. | Hipismo / Equestrianism, Horses | 22 | 130 |
| hist. | Historia / History | 153 | 1281 |
| hort. | Horticultura / Horticulture | 31 | 239 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 98 | 109 |
| ind | Industria / Industry | 25 | 481 |
| indum. | Indumentaria / Clothing, Fashion | 177 | 440 |
| ingen. | Ingeniería / Engineering | 5 | 904 |
| inmue. | Inmuebles / Real Estate | 2 | 236 |
| internet | Internet / Internet | 15 | 1395 |
| juego | Juegos / Games | 30 | 855 |
| juguetes | Juguetes / Toys | 22 | 214 |
| jur. | Jurisprudencia / Law | 158 | 580 |
| ling. | Lingüística / Linguistics | 170 | 1358 |
| lit. | Literatura / Literature | 69 | 1182 |
| loc. | Locución / Idiom | 108 | 710 |
| market. | Marketing / Marketing, Advertising | 1 | 537 |
| mat. | Matemáticas / Mathematics | 96 | 778 |
| material | Ciencia de materiales / Materials Science | 6 | 274 |
| med. | Medicina / Medicine | 601 | 806 |
| meteo. | Meteorología / Meteorology | 79 | 218 |
| micol. | Micología / Mycology | 16 | 110 |
| mil. | Militar / Military | 132 | 395 |
| miner. | Minería / Mining & Drilling | 22 | 109 |
| mineral. | Mineralogía / Mineralogy | 43 | 147 |
| mitol. | Mitología / Mythology | 270 | 490 |
| moneda | Monedas / Currencies | 18 | 252 |
| mont. | Montañismo / Climbing, Mountaineering | 5 | 249 |
| mueb. | Muebles / Furniture | 53 | 225 |
| mús. | Música / Music | 231 | 1682 |
| náut. | Náutica / Nautical Science | 113 | 211 |
| neol. | Neologismos / Neologisms | 1 | 195 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 4 | 172 |
| odont. | Odontología / Dental Medicine | 24 | 128 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 130 |
| onomást. | Onomástica / Names of Persons | 1 | 210 |
| ópt | Óptica / Optics | 24 | 164 |
| orn. | Ornitología / Ornithology | 592 | 141 |
| period. | Periodismo / Journalism | 24 | 428 |
| pol. | Política / Politics | 150 | 948 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 376 | 567 |
| proverb. | Proverbio / Proverb | 60 | 593 |
| psico. | Psicología / Psychology | 48 | 889 |
| quím. | Química / Chemistry | 299 | 525 |
| relig. | Religión / Religion | 263 | 663 |
| reloj | Relojes / Watches, Clocks | 17 | 199 |
| seguro | Seguro / Insurance | 4 | 164 |
| silv. | Silvicultura / Forestry | 19 | 164 |
| sociol. | Sociología / Sociology | 13 | 519 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 1608 | |
| teatro | Teatro / Theatre | 44 | 489 |
| tec. | Tecnología / Technology | 104 | 1196 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 5 | 245 |
| telecom. | Telecomunicación / Telecommunications | 10 | 523 |
| textil | Textil / Textiles, Textile Industry | 33 | 151 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 79 | 1566 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 14 | 270 |
| trá. | Tráfico / Traffic | 37 | 304 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 19 | 319 |
| tur. | Turismo, hostelería / Travel Industry | 18 | 519 |
| TV | Televisión y radio / Radio and Television | 24 | 542 |
| UE | Unión Europea / European Union | 3 | 650 |
| unid. | Unidades de medida / Units, Measures, Weights | 40 | 416 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 257 |
| urban. | Urbanismo / Urban Planning | 7 | 220 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 15 | 165 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 1 | 673 |
| zool. | Zoología / Zoology, Animals | 713 | 650 |
