Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 17 | 371 |
| aero. | Aeronáutica / Aviation | 68 | 419 |
| agr. | Agricultura / Agriculture, Aquaculture | 116 | 249 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 6 | 280 |
| anat. | Anatomía / Human Anatomy | 292 | 448 |
| armadura | Armadura / Historic Armour | 8 | 113 |
| armas | Armas / Weapons | 47 | 343 |
| arq. | Arquitectura / Architecture | 69 | 424 |
| arqueol. | Arqueología / Archaeology | 21 | 325 |
| arte | Arte / Art | 35 | 1076 |
| astron. | Astronomía / Astronomy | 50 | 528 |
| audio | Audiología / Audiology | 5 | 175 |
| automov. | Términos automovilísticos / Automotive Engineering | 34 | 443 |
| baile | Baile / Dance | 13 | 350 |
| bibl. | Bíblico / Biblical | 6 | 336 |
| biblio. | Biblioteconomía / Library Science | 4 | 166 |
| bici. | Bicicleta / Bicycle | 8 | 445 |
| biochem. | Bioquímica / Biochemistry | 35 | 279 |
| biol. | Biología / Biology | 120 | 585 |
| biotec. | Biotecnología / Biotechnology | 3 | 245 |
| Bolsa | Bolsa / Stock Exchange | 1 | 221 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 113 |
| bot. | Botánica, plantas / Botany, Plants | 498 | 364 |
| caza | Caza / Hunting | 7 | 114 |
| cerv. | Elaboración de cerveza / Brewing | 2 | 146 |
| ciencia | Ciencia / Academic Disciplines | 43 | 1398 |
| cine | Cine / Film | 47 | 1188 |
| comerc. | Comercio / Commerce | 68 | 505 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 8 | 316 |
| constr. | Construcción / Construction | 15 | 298 |
| conta. | Contabilidad / Accounting | 2 | 370 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 27 | 238 |
| dep. | Deporte / Sports | 209 | 874 |
| drogas | Drogas / Drugs | 29 | 229 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 27 | 641 |
| econ. | Economía y dirección de empresas / Economy | 43 | 824 |
| edit. | Industria editorial / Publishing | 7 | 236 |
| edu. | Educación / Education | 48 | 1089 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 70 | 615 |
| enol. | Enología / Oenology | 7 | 117 |
| entom. | Entomología / Entomology | 51 | 94 |
| esot. | Esoterismo / Esotericism | 3 | 214 |
| espac. | Astronáutica y exploración espacial / Astronautics | 16 | 281 |
| espec. | Término especial / Specialized Term | 2 | 316 |
| estad. | Estadística / Statistics | 3 | 288 |
| etno. | Etnología / Ethnology | 238 | 244 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 17 | 734 |
| farm. | Farmacia / Pharmacy | 31 | 252 |
| ferro | Ferrocarril / Rail | 20 | 192 |
| filos. | Filosofía / Philosophy | 7 | 827 |
| fin. | Finanzas / Finance | 42 | 527 |
| fís. | Física / Physics | 50 | 703 |
| fonét | Fonética / Phonetics | 5 | 352 |
| foto. | Fotografía / Photography | 17 | 744 |
| gastr. | Gastronomía / Gastronomy, Cooking | 888 | 591 |
| geogr. | Geografía / Geography | 401 | 745 |
| geol. | Geología / Geology | 54 | 257 |
| herram. | Herramientas / Tools | 33 | 422 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 9 | 96 |
| hipis. | Hipismo / Equestrianism, Horses | 17 | 124 |
| hist. | Historia / History | 90 | 1164 |
| hort. | Horticultura / Horticulture | 24 | 222 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 81 | 98 |
| ind | Industria / Industry | 19 | 442 |
| indum. | Indumentaria / Clothing, Fashion | 147 | 405 |
| ingen. | Ingeniería / Engineering | 4 | 830 |
| inmue. | Inmuebles / Real Estate | 1 | 215 |
| internet | Internet / Internet | 12 | 1290 |
| juego | Juegos / Games | 25 | 786 |
| juguetes | Juguetes / Toys | 17 | 193 |
| jur. | Jurisprudencia / Law | 146 | 528 |
| ling. | Lingüística / Linguistics | 147 | 1231 |
| lit. | Literatura / Literature | 47 | 1090 |
| loc. | Locución / Idiom | 108 | 717 |
| market. | Marketing / Marketing | 1 | 500 |
| mat. | Matemáticas / Mathematics | 26 | 701 |
| material | Ciencia de materiales / Materials Science | 4 | 244 |
| med. | Medicina / Medicine | 430 | 726 |
| meteo. | Meteorología / Meteorology | 56 | 199 |
| micol. | Micología / Mycology | 13 | 96 |
| mil. | Militar / Military | 110 | 358 |
| miner. | Minería / Mining & Drilling | 19 | 97 |
| mineral. | Mineralogía / Mineralogy | 34 | 132 |
| mitol. | Mitología / Mythology | 246 | 456 |
| moneda | Monedas / Currencies | 15 | 227 |
| mont. | Montañismo / Climbing, Mountaineering | 4 | 225 |
| mueb. | Muebles / Furniture | 26 | 207 |
| mús. | Música / Music | 171 | 1567 |
| náut. | Náutica / Nautical Science | 89 | 193 |
| neol. | Neologismos / Neologisms | 1 | 197 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 3 | 151 |
| odont. | Odontología / Dental Medicine | 21 | 117 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 131 |
| onomást. | Onomástica / Names of Persons | 1 | 182 |
| ópt | Óptica / Optics | 10 | 144 |
| orn. | Ornitología / Ornithology | 461 | 119 |
| period. | Periodismo / Journalism | 21 | 390 |
| pol. | Política / Politics | 118 | 855 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 330 | 519 |
| proverb. | Proverbio / Proverb | 10 | 554 |
| psico. | Psicología / Psychology | 33 | 810 |
| quím. | Química / Chemistry | 227 | 473 |
| relig. | Religión / Religion | 178 | 609 |
| reloj | Relojes / Watches, Clocks | 12 | 180 |
| seguro | Seguro / Insurance | 4 | 143 |
| silv. | Silvicultura / Forestry | 13 | 146 |
| sociol. | Sociología / Sociology | 8 | 484 |
| teatro | Teatro / Theatre | 37 | 451 |
| tec. | Tecnología / Technology | 78 | 1093 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 2 | 219 |
| telecom. | Telecomunicación / Telecommunications | 7 | 480 |
| textil | Textil / Textiles, Textile Industry | 23 | 141 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 65 | 1434 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 12 | 248 |
| trá. | Tráfico / Traffic | 33 | 277 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 11 | 288 |
| tur. | Turismo, hostelería / Travel Industry | 11 | 478 |
| TV | Televisión y radio / Radio and Television | 22 | 500 |
| UE | Unión Europea / European Union | 1 | 592 |
| unid. | Unidades de medida / Units, Measures, Weights | 35 | 373 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 238 |
| urban. | Urbanismo / Urban Planning | 4 | 197 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 10 | 148 |
| zool. | Zoología / Zoology, Animals | 540 | 599 |
