Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 17 | 382 |
| aero. | Aeronáutica / Aviation | 71 | 430 |
| agr. | Agricultura / Agriculture, Aquaculture | 121 | 253 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 6 | 289 |
| anat. | Anatomía / Human Anatomy | 297 | 465 |
| armadura | Armadura / Historic Armour | 9 | 119 |
| armas | Armas / Weapons | 50 | 354 |
| arq. | Arquitectura / Architecture | 72 | 439 |
| arqueol. | Arqueología / Archaeology | 22 | 334 |
| arte | Arte / Art | 38 | 1101 |
| astron. | Astronomía / Astronomy | 58 | 540 |
| audio | Audiología / Audiology | 5 | 179 |
| automov. | Términos automovilísticos / Automotive Engineering | 37 | 455 |
| baile | Baile / Dance | 14 | 360 |
| bibl. | Bíblico / Biblical | 7 | 343 |
| biblio. | Biblioteconomía / Library Science | 4 | 170 |
| bici. | Bicicleta / Bicycle | 8 | 455 |
| biochem. | Bioquímica / Biochemistry | 36 | 291 |
| biol. | Biología / Biology | 133 | 607 |
| biotec. | Biotecnología / Biotechnology | 3 | 253 |
| Bolsa | Bolsa / Stock Exchange | 1 | 232 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 118 |
| bot. | Botánica, plantas / Botany, Plants | 514 | 375 |
| caza | Caza / Hunting | 7 | 120 |
| cerv. | Elaboración de cerveza / Brewing | 2 | 148 |
| ciencia | Ciencia / Academic Disciplines | 45 | 1440 |
| cine | Cine / Film | 48 | 1209 |
| comerc. | Comercio / Commerce | 72 | 517 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 8 | 323 |
| constr. | Construcción / Construction | 16 | 306 |
| conta. | Contabilidad / Accounting | 2 | 379 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 27 | 243 |
| dep. | Deporte / Sports | 215 | 892 |
| drogas | Drogas / Drugs | 30 | 241 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 29 | 664 |
| econ. | Economía y dirección de empresas / Economy | 51 | 842 |
| edit. | Industria editorial / Publishing | 8 | 240 |
| edu. | Educación / Education | 50 | 1114 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 71 | 634 |
| enol. | Enología / Oenology | 7 | 119 |
| entom. | Entomología / Entomology | 55 | 98 |
| esot. | Esoterismo / Esotericism | 4 | 218 |
| espac. | Astronáutica y exploración espacial / Astronautics | 17 | 291 |
| espec. | Término especial / Specialized Term | 2 | 325 |
| estad. | Estadística / Statistics | 3 | 304 |
| etno. | Etnología / Ethnology | 239 | 252 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 17 | 748 |
| farm. | Farmacia / Pharmacy | 32 | 263 |
| ferro | Ferrocarril / Rail | 21 | 198 |
| filos. | Filosofía / Philosophy | 7 | 849 |
| fin. | Finanzas / Finance | 43 | 542 |
| fís. | Física / Physics | 61 | 727 |
| fonét | Fonética / Phonetics | 7 | 363 |
| foto. | Fotografía / Photography | 18 | 756 |
| gastr. | Gastronomía / Gastronomy, Cooking | 901 | 606 |
| geogr. | Geografía / Geography | 412 | 766 |
| geol. | Geología / Geology | 56 | 265 |
| herram. | Herramientas / Tools | 35 | 432 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 9 | 102 |
| hipis. | Hipismo / Equestrianism, Horses | 17 | 128 |
| hist. | Historia / History | 96 | 1194 |
| hort. | Horticultura / Horticulture | 25 | 229 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 83 | 100 |
| ind | Industria / Industry | 19 | 456 |
| indum. | Indumentaria / Clothing, Fashion | 152 | 414 |
| ingen. | Ingeniería / Engineering | 4 | 853 |
| inmue. | Inmuebles / Real Estate | 2 | 221 |
| internet | Internet / Internet | 12 | 1321 |
| juego | Juegos / Games | 27 | 808 |
| juguetes | Juguetes / Toys | 19 | 199 |
| jur. | Jurisprudencia / Law | 151 | 545 |
| ling. | Lingüística / Linguistics | 151 | 1265 |
| lit. | Literatura / Literature | 49 | 1117 |
| loc. | Locución / Idiom | 108 | 714 |
| market. | Marketing / Marketing, Advertising | 1 | 512 |
| mat. | Matemáticas / Mathematics | 32 | 726 |
| material | Ciencia de materiales / Materials Science | 5 | 257 |
| med. | Medicina / Medicine | 459 | 749 |
| meteo. | Meteorología / Meteorology | 66 | 205 |
| micol. | Micología / Mycology | 13 | 102 |
| mil. | Militar / Military | 114 | 370 |
| miner. | Minería / Mining & Drilling | 21 | 102 |
| mineral. | Mineralogía / Mineralogy | 35 | 136 |
| mitol. | Mitología / Mythology | 250 | 468 |
| moneda | Monedas / Currencies | 16 | 236 |
| mont. | Montañismo / Climbing, Mountaineering | 5 | 235 |
| mueb. | Muebles / Furniture | 31 | 211 |
| mús. | Música / Music | 177 | 1590 |
| náut. | Náutica / Nautical Science | 95 | 201 |
| neol. | Neologismos / Neologisms | 1 | 196 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 3 | 160 |
| odont. | Odontología / Dental Medicine | 21 | 121 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 130 |
| onomást. | Onomástica / Names of Persons | 1 | 191 |
| ópt | Óptica / Optics | 14 | 150 |
| orn. | Ornitología / Ornithology | 482 | 124 |
| period. | Periodismo / Journalism | 24 | 405 |
| pol. | Política / Politics | 128 | 884 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 342 | 534 |
| proverb. | Proverbio / Proverb | 10 | 565 |
| psico. | Psicología / Psychology | 37 | 837 |
| quím. | Química / Chemistry | 230 | 487 |
| relig. | Religión / Religion | 192 | 621 |
| reloj | Relojes / Watches, Clocks | 12 | 184 |
| seguro | Seguro / Insurance | 4 | 150 |
| silv. | Silvicultura / Forestry | 13 | 151 |
| sociol. | Sociología / Sociology | 9 | 492 |
| teatro | Teatro / Theatre | 37 | 463 |
| tec. | Tecnología / Technology | 82 | 1123 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 2 | 232 |
| telecom. | Telecomunicación / Telecommunications | 7 | 490 |
| textil | Textil / Textiles, Textile Industry | 24 | 145 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 66 | 1468 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 12 | 252 |
| trá. | Tráfico / Traffic | 33 | 284 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 11 | 298 |
| tur. | Turismo, hostelería / Travel Industry | 15 | 488 |
| TV | Televisión y radio / Radio and Television | 22 | 511 |
| UE | Unión Europea / European Union | 1 | 608 |
| unid. | Unidades de medida / Units, Measures, Weights | 36 | 383 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 247 |
| urban. | Urbanismo / Urban Planning | 5 | 203 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 11 | 154 |
| zool. | Zoología / Zoology, Animals | 577 | 619 |
