Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 52 | 426 |
| aero. | Aeronáutica / Aviation | 146 | 485 |
| agr. | Agricultura / Agriculture, Aquaculture | 224 | 295 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 42 | 311 |
| anat. | Anatomía / Human Anatomy | 560 | 531 |
| armadura | Armadura / Historic Armour | 10 | 145 |
| armas | Armas / Weapons | 180 | 403 |
| arq. | Arquitectura / Architecture | 170 | 495 |
| arqueol. | Arqueología / Archaeology | 40 | 375 |
| arte | Arte / Art | 107 | 1219 |
| astron. | Astronomía / Astronomy | 136 | 631 |
| audio | Audiología / Audiology | 12 | 211 |
| automov. | Términos automovilísticos / Automotive Engineering | 115 | 511 |
| baile | Baile / Dance | 24 | 392 |
| bibl. | Bíblico / Biblical | 16 | 391 |
| biblio. | Biblioteconomía / Library Science | 6 | 197 |
| bici. | Bicicleta / Bicycle | 18 | 531 |
| biochem. | Bioquímica / Biochemistry | 62 | 340 |
| biol. | Biología / Biology | 379 | 700 |
| biotec. | Biotecnología / Biotechnology | 7 | 294 |
| Bolsa | Bolsa / Stock Exchange | 9 | 265 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 132 |
| bot. | Botánica, plantas / Botany, Plants | 700 | 416 |
| caza | Caza / Hunting | 31 | 133 |
| cerv. | Elaboración de cerveza / Brewing | 6 | 167 |
| ciencia | Ciencia / Academic Disciplines | 158 | 1651 |
| cine | Cine / Film | 130 | 1318 |
| comerc. | Comercio / Commerce | 182 | 562 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 26 | 360 |
| constr. | Construcción / Construction | 94 | 344 |
| conta. | Contabilidad / Accounting | 7 | 423 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 74 | 267 |
| dep. | Deporte / Sports | 433 | 972 |
| drogas | Drogas / Drugs | 42 | 276 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 59 | 744 |
| econ. | Economía y dirección de empresas / Economy | 128 | 944 |
| edit. | Industria editorial / Publishing | 13 | 268 |
| edu. | Educación / Education | 118 | 1250 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 122 | 711 |
| enol. | Enología / Oenology | 29 | 126 |
| entom. | Entomología / Entomology | 94 | 110 |
| esot. | Esoterismo / Esotericism | 27 | 243 |
| espac. | Astronáutica y exploración espacial / Astronautics | 31 | 347 |
| espec. | Término especial / Specialized Term | 6 | 373 |
| estad. | Estadística / Statistics | 7 | 362 |
| etno. | Etnología / Ethnology | 380 | 283 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 174 | 824 |
| farm. | Farmacia / Pharmacy | 135 | 293 |
| ferro | Ferrocarril / Rail | 32 | 221 |
| filat. | Filatelia / Philately | 6 | 64 |
| filos. | Filosofía / Philosophy | 71 | 976 |
| fin. | Finanzas / Finance | 142 | 600 |
| fís. | Física / Physics | 216 | 822 |
| fonét | Fonética / Phonetics | 10 | 420 |
| foto. | Fotografía / Photography | 29 | 841 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1410 | 674 |
| geogr. | Geografía / Geography | 596 | 885 |
| geol. | Geología / Geology | 124 | 309 |
| heráld. | Heráldica / Heraldry | 2 | 110 |
| herram. | Herramientas / Tools | 126 | 499 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 19 | 110 |
| hipis. | Hipismo / Equestrianism, Horses | 62 | 133 |
| hist. | Historia / History | 269 | 1363 |
| hort. | Horticultura / Horticulture | 59 | 251 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 149 | 114 |
| ind | Industria / Industry | 59 | 512 |
| indum. | Indumentaria / Clothing, Fashion | 289 | 465 |
| ingen. | Ingeniería / Engineering | 9 | 959 |
| inmue. | Inmuebles / Real Estate | 19 | 242 |
| internet | Internet / Internet | 37 | 1478 |
| juego | Juegos / Games | 73 | 922 |
| juguetes | Juguetes / Toys | 35 | 228 |
| jur. | Jurisprudencia / Law | 344 | 602 |
| ling. | Lingüística / Linguistics | 410 | 1450 |
| lit. | Literatura / Literature | 222 | 1268 |
| loc. | Locución / Idiom | 105 | 708 |
| market. | Marketing / Marketing, Advertising | 2 | 556 |
| mat. | Matemáticas / Mathematics | 194 | 841 |
| material | Ciencia de materiales / Materials Science | 14 | 293 |
| med. | Medicina / Medicine | 1405 | 854 |
| meteo. | Meteorología / Meteorology | 155 | 233 |
| micol. | Micología / Mycology | 24 | 115 |
| mil. | Militar / Military | 221 | 423 |
| miner. | Minería / Mining & Drilling | 27 | 113 |
| mineral. | Mineralogía / Mineralogy | 58 | 155 |
| mitol. | Mitología / Mythology | 299 | 524 |
| moneda | Monedas / Currencies | 27 | 265 |
| mont. | Montañismo / Climbing, Mountaineering | 9 | 262 |
| mueb. | Muebles / Furniture | 89 | 235 |
| mús. | Música / Music | 325 | 1771 |
| náut. | Náutica / Nautical Science | 245 | 223 |
| neol. | Neologismos / Neologisms | 3 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 6 | 183 |
| odont. | Odontología / Dental Medicine | 49 | 133 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 128 |
| onomást. | Onomástica / Names of Persons | 25 | 226 |
| ópt | Óptica / Optics | 31 | 175 |
| orn. | Ornitología / Ornithology | 931 | 151 |
| period. | Periodismo / Journalism | 34 | 454 |
| pol. | Política / Politics | 306 | 1014 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 805 | 591 |
| proverb. | Proverbio / Proverb | 61 | 628 |
| psico. | Psicología / Psychology | 175 | 936 |
| quím. | Química / Chemistry | 404 | 559 |
| relig. | Religión / Religion | 554 | 702 |
| reloj | Relojes / Watches, Clocks | 23 | 207 |
| retór. | Retórica / Rhetoric | 2 | 411 |
| seguro | Seguro / Insurance | 10 | 174 |
| silv. | Silvicultura / Forestry | 35 | 176 |
| sociol. | Sociología / Sociology | 44 | 554 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 1873 | 9 |
| teatro | Teatro / Theatre | 74 | 505 |
| tec. | Tecnología / Technology | 170 | 1290 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 21 | 257 |
| telecom. | Telecomunicación / Telecommunications | 59 | 548 |
| textil | Textil / Textiles, Textile Industry | 63 | 161 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 149 | 1674 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 19 | 284 |
| trá. | Tráfico / Traffic | 54 | 328 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 44 | 348 |
| tur. | Turismo, hostelería / Travel Industry | 38 | 542 |
| TV | Televisión y radio / Radio and Television | 57 | 567 |
| UE | Unión Europea / European Union | 3 | 688 |
| unid. | Unidades de medida / Units, Measures, Weights | 66 | 436 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 269 |
| urban. | Urbanismo / Urban Planning | 16 | 235 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 33 | 169 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 2 | 705 |
| zool. | Zoología / Zoology, Animals | 941 | 669 |
