Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 17 | 396 |
| aero. | Aeronáutica / Aviation | 80 | 445 |
| agr. | Agricultura / Agriculture, Aquaculture | 134 | 269 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 11 | 299 |
| anat. | Anatomía / Human Anatomy | 322 | 490 |
| armadura | Armadura / Historic Armour | 9 | 127 |
| armas | Armas / Weapons | 55 | 374 |
| arq. | Arquitectura / Architecture | 88 | 461 |
| arqueol. | Arqueología / Archaeology | 29 | 351 |
| arte | Arte / Art | 47 | 1140 |
| astron. | Astronomía / Astronomy | 76 | 576 |
| audio | Audiología / Audiology | 5 | 190 |
| automov. | Términos automovilísticos / Automotive Engineering | 44 | 473 |
| baile | Baile / Dance | 20 | 378 |
| bibl. | Bíblico / Biblical | 7 | 359 |
| biblio. | Biblioteconomía / Library Science | 4 | 180 |
| bici. | Bicicleta / Bicycle | 8 | 484 |
| biochem. | Bioquímica / Biochemistry | 43 | 309 |
| biol. | Biología / Biology | 187 | 640 |
| biotec. | Biotecnología / Biotechnology | 4 | 268 |
| Bolsa | Bolsa / Stock Exchange | 2 | 241 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 123 |
| bot. | Botánica, plantas / Botany, Plants | 532 | 394 |
| caza | Caza / Hunting | 8 | 128 |
| cerv. | Elaboración de cerveza / Brewing | 3 | 156 |
| ciencia | Ciencia / Academic Disciplines | 90 | 1499 |
| cine | Cine / Film | 54 | 1252 |
| comerc. | Comercio / Commerce | 81 | 531 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 9 | 343 |
| constr. | Construcción / Construction | 22 | 318 |
| conta. | Contabilidad / Accounting | 3 | 397 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 28 | 251 |
| dep. | Deporte / Sports | 230 | 918 |
| drogas | Drogas / Drugs | 30 | 254 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 29 | 691 |
| econ. | Economía y dirección de empresas / Economy | 59 | 875 |
| edit. | Industria editorial / Publishing | 9 | 249 |
| edu. | Educación / Education | 58 | 1168 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 74 | 659 |
| enol. | Enología / Oenology | 9 | 121 |
| entom. | Entomología / Entomology | 69 | 102 |
| esot. | Esoterismo / Esotericism | 7 | 228 |
| espac. | Astronáutica y exploración espacial / Astronautics | 17 | 311 |
| espec. | Término especial / Specialized Term | 3 | 342 |
| estad. | Estadística / Statistics | 4 | 318 |
| etno. | Etnología / Ethnology | 251 | 265 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 18 | 776 |
| farm. | Farmacia / Pharmacy | 36 | 276 |
| ferro | Ferrocarril / Rail | 21 | 213 |
| filos. | Filosofía / Philosophy | 15 | 893 |
| fin. | Finanzas / Finance | 52 | 561 |
| fís. | Física / Physics | 92 | 765 |
| fonét | Fonética / Phonetics | 9 | 385 |
| foto. | Fotografía / Photography | 22 | 794 |
| gastr. | Gastronomía / Gastronomy, Cooking | 931 | 632 |
| geogr. | Geografía / Geography | 426 | 809 |
| geol. | Geología / Geology | 70 | 277 |
| herram. | Herramientas / Tools | 48 | 456 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 11 | 104 |
| hipis. | Hipismo / Equestrianism, Horses | 21 | 129 |
| hist. | Historia / History | 116 | 1256 |
| hort. | Horticultura / Horticulture | 29 | 237 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 85 | 107 |
| ind | Industria / Industry | 26 | 473 |
| indum. | Indumentaria / Clothing, Fashion | 167 | 434 |
| ingen. | Ingeniería / Engineering | 5 | 890 |
| inmue. | Inmuebles / Real Estate | 2 | 230 |
| internet | Internet / Internet | 15 | 1381 |
| juego | Juegos / Games | 29 | 848 |
| juguetes | Juguetes / Toys | 22 | 207 |
| jur. | Jurisprudencia / Law | 154 | 571 |
| ling. | Lingüística / Linguistics | 163 | 1329 |
| lit. | Literatura / Literature | 53 | 1168 |
| loc. | Locución / Idiom | 108 | 711 |
| market. | Marketing / Marketing, Advertising | 1 | 532 |
| mat. | Matemáticas / Mathematics | 93 | 768 |
| material | Ciencia de materiales / Materials Science | 5 | 267 |
| med. | Medicina / Medicine | 568 | 790 |
| meteo. | Meteorología / Meteorology | 73 | 218 |
| micol. | Micología / Mycology | 15 | 109 |
| mil. | Militar / Military | 122 | 391 |
| miner. | Minería / Mining & Drilling | 21 | 108 |
| mineral. | Mineralogía / Mineralogy | 41 | 146 |
| mitol. | Mitología / Mythology | 253 | 486 |
| moneda | Monedas / Currencies | 17 | 246 |
| mont. | Montañismo / Climbing, Mountaineering | 5 | 247 |
| mueb. | Muebles / Furniture | 38 | 223 |
| mús. | Música / Music | 209 | 1660 |
| náut. | Náutica / Nautical Science | 100 | 208 |
| neol. | Neologismos / Neologisms | 1 | 195 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 4 | 169 |
| odont. | Odontología / Dental Medicine | 23 | 126 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 130 |
| onomást. | Onomástica / Names of Persons | 1 | 206 |
| ópt | Óptica / Optics | 24 | 159 |
| orn. | Ornitología / Ornithology | 584 | 137 |
| period. | Periodismo / Journalism | 24 | 424 |
| pol. | Política / Politics | 147 | 928 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 363 | 553 |
| proverb. | Proverbio / Proverb | 53 | 583 |
| psico. | Psicología / Psychology | 46 | 874 |
| quím. | Química / Chemistry | 285 | 513 |
| relig. | Religión / Religion | 236 | 652 |
| reloj | Relojes / Watches, Clocks | 14 | 196 |
| seguro | Seguro / Insurance | 4 | 159 |
| silv. | Silvicultura / Forestry | 15 | 162 |
| sociol. | Sociología / Sociology | 13 | 512 |
| teatro | Teatro / Theatre | 42 | 484 |
| tec. | Tecnología / Technology | 100 | 1174 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 5 | 243 |
| telecom. | Telecomunicación / Telecommunications | 7 | 514 |
| textil | Textil / Textiles, Textile Industry | 28 | 150 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 75 | 1541 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 13 | 268 |
| trá. | Tráfico / Traffic | 35 | 300 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 12 | 313 |
| tur. | Turismo, hostelería / Travel Industry | 17 | 508 |
| TV | Televisión y radio / Radio and Television | 23 | 534 |
| UE | Unión Europea / European Union | 3 | 639 |
| unid. | Unidades de medida / Units, Measures, Weights | 37 | 409 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 255 |
| urban. | Urbanismo / Urban Planning | 7 | 218 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 14 | 162 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 1 | 664 |
| zool. | Zoología / Zoology, Animals | 672 | 642 |
