Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 16 | 348 |
| aero. | Aeronáutica / Aviation | 63 | 386 |
| agr. | Agricultura / Agriculture, Aquaculture | 87 | 227 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 4 | 254 |
| anat. | Anatomía / Human Anatomy | 283 | 405 |
| armadura | Armadura / Historic Armour | 8 | 104 |
| armas | Armas / Weapons | 39 | 312 |
| arq. | Arquitectura / Architecture | 61 | 396 |
| arqueol. | Arqueología / Archaeology | 8 | 302 |
| arte | Arte / Art | 28 | 1012 |
| astron. | Astronomía / Astronomy | 36 | 484 |
| audio | Audiología / Audiology | 4 | 162 |
| automov. | Términos automovilísticos / Automotive Engineering | 32 | 409 |
| baile | Baile / Dance | 8 | 335 |
| bibl. | Bíblico / Biblical | 6 | 321 |
| biblio. | Biblioteconomía / Library Science | 4 | 157 |
| bici. | Bicicleta / Bicycle | 7 | 414 |
| biochem. | Bioquímica / Biochemistry | 21 | 259 |
| biol. | Biología / Biology | 77 | 536 |
| biotec. | Biotecnología / Biotechnology | 2 | 224 |
| Bolsa | Bolsa / Stock Exchange | 1 | 201 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 106 |
| bot. | Botánica, plantas / Botany, Plants | 454 | 330 |
| caza | Caza / Hunting | 7 | 102 |
| cerv. | Elaboración de cerveza / Brewing | 2 | 131 |
| ciencia | Ciencia / Academic Disciplines | 36 | 1303 |
| cine | Cine / Film | 45 | 1119 |
| comerc. | Comercio / Commerce | 64 | 472 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 8 | 292 |
| constr. | Construcción / Construction | 13 | 284 |
| conta. | Contabilidad / Accounting | 2 | 349 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 27 | 219 |
| dep. | Deporte / Sports | 201 | 824 |
| drogas | Drogas / Drugs | 28 | 208 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 24 | 597 |
| econ. | Economía y dirección de empresas / Economy | 41 | 768 |
| edit. | Industria editorial / Publishing | 7 | 227 |
| edu. | Educación / Education | 45 | 1020 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 64 | 584 |
| enol. | Enología / Oenology | 7 | 111 |
| entom. | Entomología / Entomology | 34 | 81 |
| esot. | Esoterismo / Esotericism | 1 | 199 |
| espac. | Astronáutica y exploración espacial / Astronautics | 16 | 256 |
| espec. | Término especial / Specialized Term | 2 | 298 |
| estad. | Estadística / Statistics | 3 | 273 |
| etno. | Etnología / Ethnology | 221 | 230 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 17 | 690 |
| farm. | Farmacia / Pharmacy | 28 | 235 |
| ferro | Ferrocarril / Rail | 20 | 178 |
| filos. | Filosofía / Philosophy | 3 | 770 |
| fin. | Finanzas / Finance | 38 | 504 |
| fís. | Física / Physics | 42 | 648 |
| fonét | Fonética / Phonetics | 5 | 323 |
| foto. | Fotografía / Photography | 17 | 698 |
| gastr. | Gastronomía / Gastronomy, Cooking | 865 | 550 |
| geogr. | Geografía / Geography | 391 | 695 |
| geol. | Geología / Geology | 39 | 238 |
| herram. | Herramientas / Tools | 30 | 385 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 9 | 91 |
| hipis. | Hipismo / Equestrianism, Horses | 15 | 113 |
| hist. | Historia / History | 63 | 1085 |
| hort. | Horticultura / Horticulture | 19 | 203 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 41 | 88 |
| ind | Industria / Industry | 47 | 409 |
| indum. | Indumentaria / Clothing, Fashion | 141 | 373 |
| ingen. | Ingeniería / Engineering | 4 | 770 |
| inmue. | Inmuebles / Real Estate | 1 | 199 |
| internet | Internet / Internet | 10 | 1201 |
| juego | Juegos / Games | 21 | 718 |
| juguetes | Juguetes / Toys | 17 | 180 |
| jur. | Jurisprudencia / Law | 142 | 504 |
| ling. | Lingüística / Linguistics | 142 | 1156 |
| lit. | Literatura / Literature | 36 | 1026 |
| loc. | Locución / Idiom | 108 | 720 |
| market. | Marketing / Marketing | 1 | 463 |
| mat. | Matemáticas / Mathematics | 23 | 655 |
| material | Ciencia de materiales / Materials Science | 3 | 231 |
| med. | Medicina / Medicine | 392 | 679 |
| meteo. | Meteorología / Meteorology | 50 | 184 |
| micol. | Micología / Mycology | 12 | 85 |
| mil. | Militar / Military | 93 | 326 |
| miner. | Minería / Mining & Drilling | 19 | 93 |
| mineral. | Mineralogía / Mineralogy | 23 | 124 |
| mitol. | Mitología / Mythology | 52 | 425 |
| moneda | Monedas / Currencies | 14 | 202 |
| mont. | Montañismo / Climbing, Mountaineering | 4 | 202 |
| mueb. | Muebles / Furniture | 23 | 193 |
| mús. | Música / Music | 166 | 1474 |
| náut. | Náutica / Nautical Science | 81 | 181 |
| neol. | Neologismos / Neologisms | 1 | 197 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 3 | 143 |
| odont. | Odontología / Dental Medicine | 20 | 111 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 131 |
| onomást. | Onomástica / Names of Persons | 1 | 159 |
| ópt | Óptica / Optics | 6 | 135 |
| orn. | Ornitología / Ornithology | 394 | 104 |
| period. | Periodismo / Journalism | 20 | 363 |
| pol. | Política / Politics | 110 | 788 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 305 | 487 |
| proverb. | Proverbio / Proverb | 10 | 516 |
| psico. | Psicología / Psychology | 30 | 763 |
| quím. | Química / Chemistry | 209 | 447 |
| relig. | Religión / Religion | 138 | 581 |
| reloj | Relojes / Watches, Clocks | 10 | 169 |
| seguro | Seguro / Insurance | 4 | 135 |
| silv. | Silvicultura / Forestry | 13 | 134 |
| sociol. | Sociología / Sociology | 7 | 454 |
| teatro | Teatro / Theatre | 32 | 430 |
| tec. | Tecnología / Technology | 75 | 1012 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 1 | 206 |
| telecom. | Telecomunicación / Telecommunications | 6 | 450 |
| textil | Textil / Textiles, Textile Industry | 19 | 129 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 63 | 1328 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 12 | 230 |
| trá. | Tráfico / Traffic | 32 | 259 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 10 | 271 |
| tur. | Turismo, hostelería / Travel Industry | 10 | 443 |
| TV | Televisión y radio / Radio and Television | 20 | 466 |
| UE | Unión Europea / European Union | 1 | 545 |
| unid. | Unidades de medida / Units, Measures, Weights | 32 | 345 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 217 |
| urban. | Urbanismo / Urban Planning | 4 | 185 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 10 | 141 |
| zool. | Zoología / Zoology, Animals | 501 | 559 |
