Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 28 | 412 |
| aero. | Aeronáutica / Aviation | 97 | 460 |
| agr. | Agricultura / Agriculture, Aquaculture | 159 | 282 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 23 | 307 |
| anat. | Anatomía / Human Anatomy | 405 | 516 |
| armadura | Armadura / Historic Armour | 9 | 133 |
| armas | Armas / Weapons | 80 | 384 |
| arq. | Arquitectura / Architecture | 127 | 473 |
| arqueol. | Arqueología / Archaeology | 39 | 363 |
| arte | Arte / Art | 67 | 1177 |
| astron. | Astronomía / Astronomy | 91 | 598 |
| audio | Audiología / Audiology | 8 | 199 |
| automov. | Términos automovilísticos / Automotive Engineering | 67 | 492 |
| baile | Baile / Dance | 21 | 383 |
| bibl. | Bíblico / Biblical | 7 | 372 |
| biblio. | Biblioteconomía / Library Science | 4 | 185 |
| bici. | Bicicleta / Bicycle | 11 | 509 |
| biochem. | Bioquímica / Biochemistry | 48 | 322 |
| biol. | Biología / Biology | 231 | 668 |
| biotec. | Biotecnología / Biotechnology | 7 | 282 |
| Bolsa | Bolsa / Stock Exchange | 4 | 255 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 8 | 130 |
| bot. | Botánica, plantas / Botany, Plants | 573 | 403 |
| caza | Caza / Hunting | 15 | 131 |
| cerv. | Elaboración de cerveza / Brewing | 3 | 161 |
| ciencia | Ciencia / Academic Disciplines | 128 | 1568 |
| cine | Cine / Film | 87 | 1284 |
| comerc. | Comercio / Commerce | 122 | 548 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 26 | 350 |
| constr. | Construcción / Construction | 34 | 331 |
| conta. | Contabilidad / Accounting | 7 | 413 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 36 | 259 |
| dep. | Deporte / Sports | 286 | 945 |
| drogas | Drogas / Drugs | 31 | 262 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 37 | 718 |
| econ. | Economía y dirección de empresas / Economy | 74 | 910 |
| edit. | Industria editorial / Publishing | 10 | 256 |
| edu. | Educación / Education | 76 | 1196 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 81 | 680 |
| enol. | Enología / Oenology | 18 | 126 |
| entom. | Entomología / Entomology | 76 | 108 |
| esot. | Esoterismo / Esotericism | 25 | 234 |
| espac. | Astronáutica y exploración espacial / Astronautics | 20 | 328 |
| espec. | Término especial / Specialized Term | 3 | 356 |
| estad. | Estadística / Statistics | 5 | 337 |
| etno. | Etnología / Ethnology | 277 | 276 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 144 | 803 |
| farm. | Farmacia / Pharmacy | 47 | 291 |
| ferro | Ferrocarril / Rail | 23 | 217 |
| filat. | Filatelia / Philately | 1 | 61 |
| filos. | Filosofía / Philosophy | 42 | 930 |
| fin. | Finanzas / Finance | 72 | 581 |
| fís. | Física / Physics | 103 | 793 |
| fonét | Fonética / Phonetics | 9 | 402 |
| foto. | Fotografía / Photography | 24 | 817 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1032 | 654 |
| geogr. | Geografía / Geography | 456 | 845 |
| geol. | Geología / Geology | 81 | 291 |
| heráld. | Heráldica / Heraldry | 1 | 103 |
| herram. | Herramientas / Tools | 61 | 476 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 11 | 108 |
| hipis. | Hipismo / Equestrianism, Horses | 27 | 132 |
| hist. | Historia / History | 169 | 1306 |
| hort. | Horticultura / Horticulture | 34 | 242 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 109 | 110 |
| ind | Industria / Industry | 29 | 489 |
| indum. | Indumentaria / Clothing, Fashion | 203 | 450 |
| ingen. | Ingeniería / Engineering | 6 | 919 |
| inmue. | Inmuebles / Real Estate | 6 | 238 |
| internet | Internet / Internet | 20 | 1420 |
| juego | Juegos / Games | 36 | 875 |
| juguetes | Juguetes / Toys | 23 | 219 |
| jur. | Jurisprudencia / Law | 194 | 583 |
| ling. | Lingüística / Linguistics | 199 | 1385 |
| lit. | Literatura / Literature | 176 | 1209 |
| loc. | Locución / Idiom | 108 | 710 |
| market. | Marketing / Marketing, Advertising | 2 | 545 |
| mat. | Matemáticas / Mathematics | 109 | 798 |
| material | Ciencia de materiales / Materials Science | 6 | 281 |
| med. | Medicina / Medicine | 840 | 821 |
| meteo. | Meteorología / Meteorology | 87 | 223 |
| micol. | Micología / Mycology | 16 | 114 |
| mil. | Militar / Military | 144 | 400 |
| miner. | Minería / Mining & Drilling | 23 | 110 |
| mineral. | Mineralogía / Mineralogy | 45 | 150 |
| mitol. | Mitología / Mythology | 273 | 503 |
| moneda | Monedas / Currencies | 19 | 260 |
| mont. | Montañismo / Climbing, Mountaineering | 6 | 254 |
| mueb. | Muebles / Furniture | 57 | 230 |
| mús. | Música / Music | 242 | 1714 |
| náut. | Náutica / Nautical Science | 123 | 214 |
| neol. | Neologismos / Neologisms | 1 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 4 | 176 |
| odont. | Odontología / Dental Medicine | 28 | 130 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 130 |
| onomást. | Onomástica / Names of Persons | 1 | 215 |
| ópt | Óptica / Optics | 25 | 170 |
| orn. | Ornitología / Ornithology | 648 | 147 |
| period. | Periodismo / Journalism | 31 | 435 |
| pol. | Política / Politics | 190 | 966 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 465 | 579 |
| proverb. | Proverbio / Proverb | 61 | 606 |
| psico. | Psicología / Psychology | 64 | 901 |
| quím. | Química / Chemistry | 309 | 536 |
| relig. | Religión / Religion | 334 | 676 |
| reloj | Relojes / Watches, Clocks | 17 | 202 |
| seguro | Seguro / Insurance | 4 | 168 |
| silv. | Silvicultura / Forestry | 20 | 168 |
| sociol. | Sociología / Sociology | 23 | 532 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 1699 | 5 |
| teatro | Teatro / Theatre | 53 | 494 |
| tec. | Tecnología / Technology | 118 | 1219 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 5 | 250 |
| telecom. | Telecomunicación / Telecommunications | 19 | 530 |
| textil | Textil / Textiles, Textile Industry | 34 | 155 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 97 | 1600 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 15 | 276 |
| trá. | Tráfico / Traffic | 39 | 309 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 29 | 326 |
| tur. | Turismo, hostelería / Travel Industry | 30 | 526 |
| TV | Televisión y radio / Radio and Television | 28 | 551 |
| UE | Unión Europea / European Union | 3 | 659 |
| unid. | Unidades de medida / Units, Measures, Weights | 50 | 423 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 261 |
| urban. | Urbanismo / Urban Planning | 10 | 226 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 20 | 169 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 1 | 682 |
| zool. | Zoología / Zoology, Animals | 754 | 658 |
