Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 17 | 369 |
| aero. | Aeronáutica / Aviation | 67 | 411 |
| agr. | Agricultura / Agriculture, Aquaculture | 115 | 247 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 5 | 274 |
| anat. | Anatomía / Human Anatomy | 291 | 443 |
| armadura | Armadura / Historic Armour | 8 | 112 |
| armas | Armas / Weapons | 46 | 339 |
| arq. | Arquitectura / Architecture | 68 | 418 |
| arqueol. | Arqueología / Archaeology | 21 | 321 |
| arte | Arte / Art | 34 | 1067 |
| astron. | Astronomía / Astronomy | 48 | 515 |
| audio | Audiología / Audiology | 4 | 173 |
| automov. | Términos automovilísticos / Automotive Engineering | 34 | 437 |
| baile | Baile / Dance | 13 | 348 |
| bibl. | Bíblico / Biblical | 6 | 334 |
| biblio. | Biblioteconomía / Library Science | 4 | 163 |
| bici. | Bicicleta / Bicycle | 8 | 440 |
| biochem. | Bioquímica / Biochemistry | 33 | 275 |
| biol. | Biología / Biology | 113 | 577 |
| biotec. | Biotecnología / Biotechnology | 3 | 243 |
| Bolsa | Bolsa / Stock Exchange | 1 | 218 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 111 |
| bot. | Botánica, plantas / Botany, Plants | 490 | 357 |
| caza | Caza / Hunting | 7 | 111 |
| cerv. | Elaboración de cerveza / Brewing | 2 | 144 |
| ciencia | Ciencia / Academic Disciplines | 43 | 1383 |
| cine | Cine / Film | 47 | 1172 |
| comerc. | Comercio / Commerce | 68 | 501 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 8 | 309 |
| constr. | Construcción / Construction | 15 | 293 |
| conta. | Contabilidad / Accounting | 2 | 369 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 27 | 235 |
| dep. | Deporte / Sports | 208 | 858 |
| drogas | Drogas / Drugs | 29 | 226 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 26 | 634 |
| econ. | Economía y dirección de empresas / Economy | 43 | 818 |
| edit. | Industria editorial / Publishing | 7 | 236 |
| edu. | Educación / Education | 48 | 1079 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 69 | 611 |
| enol. | Enología / Oenology | 7 | 116 |
| entom. | Entomología / Entomology | 51 | 91 |
| esot. | Esoterismo / Esotericism | 2 | 210 |
| espac. | Astronáutica y exploración espacial / Astronautics | 16 | 273 |
| espec. | Término especial / Specialized Term | 2 | 314 |
| estad. | Estadística / Statistics | 3 | 284 |
| etno. | Etnología / Ethnology | 235 | 240 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 17 | 727 |
| farm. | Farmacia / Pharmacy | 30 | 247 |
| ferro | Ferrocarril / Rail | 20 | 190 |
| filos. | Filosofía / Philosophy | 7 | 816 |
| fin. | Finanzas / Finance | 42 | 525 |
| fís. | Física / Physics | 50 | 690 |
| fonét | Fonética / Phonetics | 5 | 346 |
| foto. | Fotografía / Photography | 17 | 736 |
| gastr. | Gastronomía / Gastronomy, Cooking | 881 | 580 |
| geogr. | Geografía / Geography | 401 | 734 |
| geol. | Geología / Geology | 52 | 252 |
| herram. | Herramientas / Tools | 33 | 411 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 9 | 94 |
| hipis. | Hipismo / Equestrianism, Horses | 17 | 123 |
| hist. | Historia / History | 88 | 1145 |
| hort. | Horticultura / Horticulture | 23 | 219 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 80 | 96 |
| ind | Industria / Industry | 18 | 438 |
| indum. | Indumentaria / Clothing, Fashion | 147 | 398 |
| ingen. | Ingeniería / Engineering | 4 | 818 |
| inmue. | Inmuebles / Real Estate | 1 | 211 |
| internet | Internet / Internet | 12 | 1269 |
| juego | Juegos / Games | 25 | 767 |
| juguetes | Juguetes / Toys | 17 | 188 |
| jur. | Jurisprudencia / Law | 145 | 526 |
| ling. | Lingüística / Linguistics | 147 | 1217 |
| lit. | Literatura / Literature | 42 | 1076 |
| loc. | Locución / Idiom | 108 | 717 |
| market. | Marketing / Marketing | 1 | 495 |
| mat. | Matemáticas / Mathematics | 24 | 687 |
| material | Ciencia de materiales / Materials Science | 4 | 241 |
| med. | Medicina / Medicine | 424 | 720 |
| meteo. | Meteorología / Meteorology | 56 | 194 |
| micol. | Micología / Mycology | 13 | 93 |
| mil. | Militar / Military | 107 | 350 |
| miner. | Minería / Mining & Drilling | 19 | 96 |
| mineral. | Mineralogía / Mineralogy | 33 | 129 |
| mitol. | Mitología / Mythology | 245 | 447 |
| moneda | Monedas / Currencies | 15 | 222 |
| mont. | Montañismo / Climbing, Mountaineering | 4 | 223 |
| mueb. | Muebles / Furniture | 26 | 203 |
| mús. | Música / Music | 171 | 1548 |
| náut. | Náutica / Nautical Science | 88 | 191 |
| neol. | Neologismos / Neologisms | 1 | 197 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 3 | 148 |
| odont. | Odontología / Dental Medicine | 21 | 116 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 131 |
| onomást. | Onomástica / Names of Persons | 1 | 176 |
| ópt | Óptica / Optics | 9 | 141 |
| orn. | Ornitología / Ornithology | 461 | 117 |
| period. | Periodismo / Journalism | 21 | 386 |
| pol. | Política / Politics | 118 | 845 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 325 | 510 |
| proverb. | Proverbio / Proverb | 10 | 549 |
| psico. | Psicología / Psychology | 32 | 803 |
| quím. | Química / Chemistry | 224 | 470 |
| relig. | Religión / Religion | 174 | 605 |
| reloj | Relojes / Watches, Clocks | 12 | 177 |
| seguro | Seguro / Insurance | 4 | 142 |
| silv. | Silvicultura / Forestry | 13 | 145 |
| sociol. | Sociología / Sociology | 8 | 478 |
| teatro | Teatro / Theatre | 37 | 448 |
| tec. | Tecnología / Technology | 76 | 1076 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 2 | 216 |
| telecom. | Telecomunicación / Telecommunications | 7 | 472 |
| textil | Textil / Textiles, Textile Industry | 21 | 138 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 63 | 1406 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 12 | 245 |
| trá. | Tráfico / Traffic | 33 | 275 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 11 | 285 |
| tur. | Turismo, hostelería / Travel Industry | 11 | 471 |
| TV | Televisión y radio / Radio and Television | 22 | 493 |
| UE | Unión Europea / European Union | 1 | 583 |
| unid. | Unidades de medida / Units, Measures, Weights | 35 | 368 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 233 |
| urban. | Urbanismo / Urban Planning | 4 | 194 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 10 | 148 |
| zool. | Zoología / Zoology, Animals | 535 | 593 |
