Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 146 | 445 |
| aero. | Aeronáutica / Aviation | 228 | 512 |
| agr. | Agricultura / Agriculture, Aquaculture | 371 | 309 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 139 | 322 |
| anat. | Anatomía / Human Anatomy | 756 | 560 |
| armadura | Armadura / Historic Armour | 12 | 161 |
| armas | Armas / Weapons | 227 | 421 |
| arq. | Arquitectura / Architecture | 333 | 521 |
| arqueol. | Arqueología / Archaeology | 58 | 397 |
| arte | Arte / Art | 190 | 1286 |
| astron. | Astronomía / Astronomy | 224 | 678 |
| audio | Audiología / Audiology | 30 | 232 |
| automov. | Términos automovilísticos / Automotive Engineering | 361 | 537 |
| baile | Baile / Dance | 38 | 409 |
| bibl. | Bíblico / Biblical | 18 | 415 |
| biblio. | Biblioteconomía / Library Science | 10 | 205 |
| bici. | Bicicleta / Bicycle | 129 | 558 |
| biol. | Biología / Biology | 598 | 733 |
| bioquím. | Bioquímica / Biochemistry | 233 | 359 |
| biotec. | Biotecnología / Biotechnology | 10 | 310 |
| Bolsa | Bolsa / Stock Exchange | 62 | 277 |
| BomUrg | Bomberos & Urgencias / Firefighting & Rescue | 34 | 146 |
| bot. | Botánica, plantas / Botany, Plants | 927 | 439 |
| caza | Caza / Hunting | 44 | 136 |
| cerv. | Elaboración de cerveza / Brewing | 17 | 173 |
| ciencia | Ciencia / Academic Disciplines | 324 | 1747 |
| cine | Cine / Film | 194 | 1367 |
| comerc. | Comercio / Commerce | 403 | 576 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 27 | 380 |
| constr. | Construcción / Construction | 218 | 359 |
| conta. | Contabilidad / Accounting | 18 | 439 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 159 | 276 |
| dep. | Deporte / Sports | 719 | 1006 |
| drogas | Drogas / Drugs | 59 | 295 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 218 | 773 |
| econ. | Economía y dirección de empresas / Economy | 356 | 985 |
| edit. | Industria editorial / Publishing | 46 | 280 |
| edu. | Educación / Education | 329 | 1303 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 253 | 750 |
| enol. | Enología / Oenology | 51 | 131 |
| entom. | Entomología / Entomology | 116 | 117 |
| esot. | Esoterismo / Esotericism | 33 | 256 |
| espac. | Astronáutica y exploración espacial / Astronautics | 39 | 374 |
| espec. | Término especial / Specialized Term | 18 | 393 |
| estad. | Estadística / Statistics | 44 | 385 |
| etno. | Etnología / Ethnology | 446 | 296 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 189 | 859 |
| farm. | Farmacia / Pharmacy | 301 | 310 |
| ferro | Ferrocarril / Rail | 86 | 237 |
| filat. | Filatelia / Philately | 6 | 65 |
| filos. | Filosofía / Philosophy | 121 | 1026 |
| fin. | Finanzas / Finance | 412 | 619 |
| fís. | Física / Physics | 305 | 867 |
| fonét | Fonética / Phonetics | 14 | 448 |
| foto. | Fotografía / Photography | 47 | 867 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1889 | 701 |
| geogr. | Geografía / Geography | 831 | 932 |
| geol. | Geología / Geology | 218 | 331 |
| heráld. | Heráldica / Heraldry | 3 | 120 |
| herram. | Herramientas / Tools | 242 | 535 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 61 | 118 |
| hipis. | Hipismo / Equestrianism, Horses | 87 | 139 |
| hist. | Historia / History | 389 | 1441 |
| hort. | Horticultura / Horticulture | 104 | 259 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 183 | 116 |
| ind | Industria / Industry | 102 | 542 |
| indum. | Indumentaria / Clothing, Fashion | 518 | 484 |
| ingen. | Ingeniería / Engineering | 36 | 1031 |
| inmue. | Inmuebles / Real Estate | 107 | 249 |
| internet | Internet / Internet | 96 | 1552 |
| juego | Juegos / Games | 98 | 983 |
| juguetes | Juguetes / Toys | 47 | 242 |
| jur. | Jurisprudencia / Law | 922 | 629 |
| ling. | Lingüística / Linguistics | 555 | 1525 |
| lit. | Literatura / Literature | 291 | 1333 |
| loc. | Locución / Idiom | 26 | 708 |
| market. | Marketing / Marketing, Advertising | 29 | 574 |
| mat. | Matemáticas / Mathematics | 330 | 893 |
| material | Ciencia de materiales / Materials Science | 76 | 312 |
| med. | Medicina / Medicine | 2351 | 897 |
| meteo. | Meteorología / Meteorology | 278 | 249 |
| micol. | Micología / Mycology | 28 | 124 |
| mil. | Militar / Military | 383 | 446 |
| miner. | Minería / Mining & Drilling | 38 | 118 |
| mineral. | Mineralogía / Mineralogy | 77 | 164 |
| mitol. | Mitología / Mythology | 322 | 548 |
| moneda | Monedas / Currencies | 38 | 281 |
| mont. | Montañismo / Climbing, Mountaineering | 104 | 274 |
| mueb. | Muebles / Furniture | 178 | 246 |
| mús. | Música / Music | 429 | 1849 |
| náut. | Náutica / Nautical Science | 367 | 231 |
| neol. | Neologismos / Neologisms | 4 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 23 | 196 |
| odont. | Odontología / Dental Medicine | 81 | 137 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 128 |
| onomást. | Onomástica / Names of Persons | 26 | 242 |
| ópt | Óptica / Optics | 56 | 187 |
| orn. | Ornitología / Ornithology | 1367 | 161 |
| period. | Periodismo / Journalism | 61 | 475 |
| pol. | Política / Politics | 662 | 1069 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 1341 | 615 |
| proverb. | Proverbio / Proverb | 68 | 655 |
| psico. | Psicología / Psychology | 365 | 980 |
| quím. | Química / Chemistry | 800 | 595 |
| relig. | Religión / Religion | 694 | 731 |
| reloj | Relojes / Watches, Clocks | 25 | 216 |
| retór. | Retórica / Rhetoric | 5 | 432 |
| seguro | Seguro / Insurance | 36 | 181 |
| silv. | Silvicultura / Forestry | 62 | 183 |
| sociol. | Sociología / Sociology | 169 | 590 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 2629 | 17 |
| teatro | Teatro / Theatre | 112 | 530 |
| tec. | Tecnología / Technology | 453 | 1374 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 57 | 273 |
| telecom. | Telecomunicación / Telecommunications | 113 | 566 |
| textil | Textil / Textiles, Textile Industry | 136 | 169 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 291 | 1770 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 27 | 299 |
| trá. | Tráfico / Traffic | 192 | 340 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 113 | 365 |
| tur. | Turismo, hostelería / Travel Industry | 111 | 566 |
| TV | Televisión y radio / Radio and Television | 83 | 578 |
| UE | Unión Europea / European Union | 10 | 726 |
| unid. | Unidades de medida / Units, Measures, Weights | 70 | 456 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 4 | 288 |
| urban. | Urbanismo / Urban Planning | 117 | 257 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 57 | 176 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 37 | 735 |
| zool. | Zoología / Zoology, Animals | 1313 | 697 |
