Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 54 | 429 |
| aero. | Aeronáutica / Aviation | 152 | 490 |
| agr. | Agricultura / Agriculture, Aquaculture | 239 | 299 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 60 | 312 |
| anat. | Anatomía / Human Anatomy | 565 | 537 |
| armadura | Armadura / Historic Armour | 10 | 146 |
| armas | Armas / Weapons | 193 | 407 |
| arq. | Arquitectura / Architecture | 196 | 503 |
| arqueol. | Arqueología / Archaeology | 40 | 381 |
| arte | Arte / Art | 112 | 1232 |
| astron. | Astronomía / Astronomy | 139 | 640 |
| audio | Audiología / Audiology | 13 | 214 |
| automov. | Términos automovilísticos / Automotive Engineering | 135 | 515 |
| baile | Baile / Dance | 27 | 395 |
| bibl. | Bíblico / Biblical | 16 | 396 |
| biblio. | Biblioteconomía / Library Science | 7 | 199 |
| bici. | Bicicleta / Bicycle | 30 | 535 |
| biochem. | Bioquímica / Biochemistry | 169 | 345 |
| biol. | Biología / Biology | 417 | 707 |
| biotec. | Biotecnología / Biotechnology | 8 | 297 |
| Bolsa | Bolsa / Stock Exchange | 10 | 266 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 10 | 136 |
| bot. | Botánica, plantas / Botany, Plants | 746 | 420 |
| caza | Caza / Hunting | 31 | 133 |
| cerv. | Elaboración de cerveza / Brewing | 7 | 167 |
| ciencia | Ciencia / Academic Disciplines | 170 | 1668 |
| cine | Cine / Film | 138 | 1330 |
| comerc. | Comercio / Commerce | 205 | 563 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 26 | 365 |
| constr. | Construcción / Construction | 102 | 349 |
| conta. | Contabilidad / Accounting | 8 | 426 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 87 | 267 |
| dep. | Deporte / Sports | 469 | 976 |
| drogas | Drogas / Drugs | 44 | 280 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 73 | 751 |
| econ. | Economía y dirección de empresas / Economy | 153 | 953 |
| edit. | Industria editorial / Publishing | 21 | 269 |
| edu. | Educación / Education | 146 | 1259 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 131 | 718 |
| enol. | Enología / Oenology | 32 | 127 |
| entom. | Entomología / Entomology | 97 | 110 |
| esot. | Esoterismo / Esotericism | 29 | 246 |
| espac. | Astronáutica y exploración espacial / Astronautics | 31 | 350 |
| espec. | Término especial / Specialized Term | 6 | 375 |
| estad. | Estadística / Statistics | 16 | 366 |
| etno. | Etnología / Ethnology | 403 | 287 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 175 | 830 |
| farm. | Farmacia / Pharmacy | 221 | 296 |
| ferro | Ferrocarril / Rail | 40 | 222 |
| filat. | Filatelia / Philately | 6 | 64 |
| filos. | Filosofía / Philosophy | 72 | 987 |
| fin. | Finanzas / Finance | 166 | 602 |
| fís. | Física / Physics | 224 | 829 |
| fonét | Fonética / Phonetics | 12 | 426 |
| foto. | Fotografía / Photography | 32 | 848 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1463 | 676 |
| geogr. | Geografía / Geography | 608 | 893 |
| geol. | Geología / Geology | 127 | 314 |
| heráld. | Heráldica / Heraldry | 2 | 112 |
| herram. | Herramientas / Tools | 138 | 506 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 21 | 113 |
| hipis. | Hipismo / Equestrianism, Horses | 69 | 134 |
| hist. | Historia / History | 279 | 1379 |
| hort. | Horticultura / Horticulture | 69 | 252 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 152 | 114 |
| ind | Industria / Industry | 75 | 516 |
| indum. | Indumentaria / Clothing, Fashion | 332 | 467 |
| ingen. | Ingeniería / Engineering | 16 | 970 |
| inmue. | Inmuebles / Real Estate | 26 | 242 |
| internet | Internet / Internet | 49 | 1500 |
| juego | Juegos / Games | 78 | 933 |
| juguetes | Juguetes / Toys | 36 | 230 |
| jur. | Jurisprudencia / Law | 374 | 610 |
| ling. | Lingüística / Linguistics | 418 | 1464 |
| lit. | Literatura / Literature | 229 | 1280 |
| loc. | Locución / Idiom | 103 | 708 |
| market. | Marketing / Marketing, Advertising | 3 | 560 |
| mat. | Matemáticas / Mathematics | 214 | 849 |
| material | Ciencia de materiales / Materials Science | 14 | 298 |
| med. | Medicina / Medicine | 1496 | 863 |
| meteo. | Meteorología / Meteorology | 166 | 237 |
| micol. | Micología / Mycology | 24 | 117 |
| mil. | Militar / Military | 245 | 429 |
| miner. | Minería / Mining & Drilling | 28 | 113 |
| mineral. | Mineralogía / Mineralogy | 59 | 156 |
| mitol. | Mitología / Mythology | 302 | 529 |
| moneda | Monedas / Currencies | 32 | 268 |
| mont. | Montañismo / Climbing, Mountaineering | 22 | 265 |
| mueb. | Muebles / Furniture | 102 | 237 |
| mús. | Música / Music | 339 | 1785 |
| náut. | Náutica / Nautical Science | 258 | 224 |
| neol. | Neologismos / Neologisms | 3 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 9 | 185 |
| odont. | Odontología / Dental Medicine | 50 | 134 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 128 |
| onomást. | Onomástica / Names of Persons | 25 | 228 |
| ópt | Óptica / Optics | 32 | 178 |
| orn. | Ornitología / Ornithology | 967 | 153 |
| period. | Periodismo / Journalism | 37 | 457 |
| pol. | Política / Politics | 324 | 1027 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 878 | 593 |
| proverb. | Proverbio / Proverb | 62 | 634 |
| psico. | Psicología / Psychology | 202 | 945 |
| quím. | Química / Chemistry | 434 | 567 |
| relig. | Religión / Religion | 568 | 704 |
| reloj | Relojes / Watches, Clocks | 23 | 208 |
| retór. | Retórica / Rhetoric | 2 | 415 |
| seguro | Seguro / Insurance | 11 | 175 |
| silv. | Silvicultura / Forestry | 37 | 178 |
| sociol. | Sociología / Sociology | 51 | 562 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 1916 | 10 |
| teatro | Teatro / Theatre | 78 | 511 |
| tec. | Tecnología / Technology | 183 | 1303 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 24 | 263 |
| telecom. | Telecomunicación / Telecommunications | 63 | 551 |
| textil | Textil / Textiles, Textile Industry | 69 | 162 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 167 | 1688 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 20 | 286 |
| trá. | Tráfico / Traffic | 64 | 330 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 47 | 350 |
| tur. | Turismo, hostelería / Travel Industry | 41 | 546 |
| TV | Televisión y radio / Radio and Television | 60 | 567 |
| UE | Unión Europea / European Union | 4 | 691 |
| unid. | Unidades de medida / Units, Measures, Weights | 66 | 439 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 1 | 272 |
| urban. | Urbanismo / Urban Planning | 54 | 236 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 34 | 171 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 2 | 714 |
| zool. | Zoología / Zoology, Animals | 965 | 674 |
