Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 17 | 402 |
| aero. | Aeronáutica / Aviation | 80 | 446 |
| agr. | Agricultura / Agriculture, Aquaculture | 136 | 269 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 14 | 301 |
| anat. | Anatomía / Human Anatomy | 324 | 497 |
| armadura | Armadura / Historic Armour | 9 | 127 |
| armas | Armas / Weapons | 59 | 377 |
| arq. | Arquitectura / Architecture | 95 | 462 |
| arqueol. | Arqueología / Archaeology | 30 | 352 |
| arte | Arte / Art | 48 | 1145 |
| astron. | Astronomía / Astronomy | 76 | 581 |
| audio | Audiología / Audiology | 5 | 192 |
| automov. | Términos automovilísticos / Automotive Engineering | 46 | 475 |
| baile | Baile / Dance | 20 | 379 |
| bibl. | Bíblico / Biblical | 7 | 361 |
| biblio. | Biblioteconomía / Library Science | 4 | 180 |
| bici. | Bicicleta / Bicycle | 9 | 490 |
| biochem. | Bioquímica / Biochemistry | 46 | 313 |
| biol. | Biología / Biology | 200 | 647 |
| biotec. | Biotecnología / Biotechnology | 4 | 270 |
| Bolsa | Bolsa / Stock Exchange | 2 | 247 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 126 |
| bot. | Botánica, plantas / Botany, Plants | 544 | 394 |
| caza | Caza / Hunting | 8 | 128 |
| cerv. | Elaboración de cerveza / Brewing | 3 | 157 |
| ciencia | Ciencia / Academic Disciplines | 93 | 1509 |
| cine | Cine / Film | 55 | 1257 |
| comerc. | Comercio / Commerce | 81 | 535 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 9 | 344 |
| constr. | Construcción / Construction | 23 | 322 |
| conta. | Contabilidad / Accounting | 3 | 401 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 28 | 252 |
| dep. | Deporte / Sports | 233 | 927 |
| drogas | Drogas / Drugs | 30 | 254 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 32 | 696 |
| econ. | Economía y dirección de empresas / Economy | 59 | 886 |
| edit. | Industria editorial / Publishing | 9 | 250 |
| edu. | Educación / Education | 58 | 1171 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 77 | 660 |
| enol. | Enología / Oenology | 9 | 123 |
| entom. | Entomología / Entomology | 71 | 102 |
| esot. | Esoterismo / Esotericism | 7 | 228 |
| espac. | Astronáutica y exploración espacial / Astronautics | 17 | 314 |
| espec. | Término especial / Specialized Term | 3 | 346 |
| estad. | Estadística / Statistics | 4 | 320 |
| etno. | Etnología / Ethnology | 253 | 266 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 18 | 781 |
| farm. | Farmacia / Pharmacy | 36 | 281 |
| ferro | Ferrocarril / Rail | 21 | 214 |
| filos. | Filosofía / Philosophy | 15 | 901 |
| fin. | Finanzas / Finance | 52 | 567 |
| fís. | Física / Physics | 95 | 771 |
| fonét | Fonética / Phonetics | 9 | 389 |
| foto. | Fotografía / Photography | 22 | 797 |
| gastr. | Gastronomía / Gastronomy, Cooking | 940 | 636 |
| geogr. | Geografía / Geography | 431 | 817 |
| geol. | Geología / Geology | 70 | 281 |
| heráld. | Heráldica / Heraldry | 1 | 98 |
| herram. | Herramientas / Tools | 49 | 461 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 11 | 105 |
| hipis. | Hipismo / Equestrianism, Horses | 21 | 129 |
| hist. | Historia / History | 133 | 1265 |
| hort. | Horticultura / Horticulture | 29 | 237 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 97 | 107 |
| ind | Industria / Industry | 25 | 478 |
| indum. | Indumentaria / Clothing, Fashion | 169 | 437 |
| ingen. | Ingeniería / Engineering | 5 | 897 |
| inmue. | Inmuebles / Real Estate | 2 | 232 |
| internet | Internet / Internet | 15 | 1390 |
| juego | Juegos / Games | 29 | 851 |
| juguetes | Juguetes / Toys | 22 | 210 |
| jur. | Jurisprudencia / Law | 155 | 580 |
| ling. | Lingüística / Linguistics | 168 | 1342 |
| lit. | Literatura / Literature | 57 | 1173 |
| loc. | Locución / Idiom | 108 | 710 |
| market. | Marketing / Marketing, Advertising | 1 | 536 |
| mat. | Matemáticas / Mathematics | 95 | 774 |
| material | Ciencia de materiales / Materials Science | 5 | 270 |
| med. | Medicina / Medicine | 578 | 800 |
| meteo. | Meteorología / Meteorology | 76 | 218 |
| micol. | Micología / Mycology | 16 | 109 |
| mil. | Militar / Military | 124 | 394 |
| miner. | Minería / Mining & Drilling | 21 | 108 |
| mineral. | Mineralogía / Mineralogy | 42 | 147 |
| mitol. | Mitología / Mythology | 264 | 488 |
| moneda | Monedas / Currencies | 18 | 249 |
| mont. | Montañismo / Climbing, Mountaineering | 5 | 248 |
| mueb. | Muebles / Furniture | 43 | 224 |
| mús. | Música / Music | 213 | 1668 |
| náut. | Náutica / Nautical Science | 100 | 209 |
| neol. | Neologismos / Neologisms | 1 | 195 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 4 | 171 |
| odont. | Odontología / Dental Medicine | 24 | 126 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 130 |
| onomást. | Onomástica / Names of Persons | 1 | 208 |
| ópt | Óptica / Optics | 24 | 161 |
| orn. | Ornitología / Ornithology | 587 | 139 |
| period. | Periodismo / Journalism | 24 | 425 |
| pol. | Política / Politics | 149 | 938 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 369 | 558 |
| proverb. | Proverbio / Proverb | 59 | 589 |
| psico. | Psicología / Psychology | 47 | 882 |
| quím. | Química / Chemistry | 289 | 520 |
| relig. | Religión / Religion | 251 | 656 |
| reloj | Relojes / Watches, Clocks | 16 | 198 |
| seguro | Seguro / Insurance | 4 | 162 |
| silv. | Silvicultura / Forestry | 16 | 162 |
| sociol. | Sociología / Sociology | 13 | 513 |
| teatro | Teatro / Theatre | 43 | 486 |
| tec. | Tecnología / Technology | 102 | 1188 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 5 | 244 |
| telecom. | Telecomunicación / Telecommunications | 7 | 517 |
| textil | Textil / Textiles, Textile Industry | 31 | 150 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 77 | 1554 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 13 | 270 |
| trá. | Tráfico / Traffic | 37 | 301 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 13 | 317 |
| tur. | Turismo, hostelería / Travel Industry | 17 | 515 |
| TV | Televisión y radio / Radio and Television | 24 | 537 |
| UE | Unión Europea / European Union | 3 | 647 |
| unid. | Unidades de medida / Units, Measures, Weights | 40 | 413 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 257 |
| urban. | Urbanismo / Urban Planning | 7 | 219 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 15 | 164 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 1 | 670 |
| zool. | Zoología / Zoology, Animals | 702 | 647 |
