Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 197 | 446 |
| aero. | Aeronáutica / Aviation | 285 | 516 |
| agr. | Agricultura / Agriculture, Aquaculture | 412 | 310 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 158 | 324 |
| anat. | Anatomía / Human Anatomy | 969 | 567 |
| armadura | Armadura / Historic Armour | 12 | 162 |
| armas | Armas / Weapons | 242 | 425 |
| arq. | Arquitectura / Architecture | 408 | 523 |
| arqueol. | Arqueología / Archaeology | 67 | 400 |
| arte | Arte / Art | 235 | 1295 |
| astron. | Astronomía / Astronomy | 253 | 682 |
| audio | Audiología / Audiology | 44 | 235 |
| automov. | Términos automovilísticos / Automotive Engineering | 416 | 541 |
| baile | Baile / Dance | 60 | 413 |
| bibl. | Bíblico / Biblical | 19 | 417 |
| biblio. | Biblioteconomía / Library Science | 16 | 209 |
| bici. | Bicicleta / Bicycle | 305 | 561 |
| biol. | Biología / Biology | 671 | 736 |
| bioquím. | Bioquímica / Biochemistry | 240 | 363 |
| biotec. | Biotecnología / Biotechnology | 11 | 312 |
| Bolsa | Bolsa / Stock Exchange | 90 | 284 |
| BomUrg | Bomberos & Urgencias / Firefighting & Rescue | 39 | 148 |
| bot. | Botánica, plantas / Botany, Plants | 978 | 443 |
| caza | Caza / Hunting | 50 | 138 |
| cerv. | Elaboración de cerveza / Brewing | 19 | 174 |
| ciencia | Ciencia / Academic Disciplines | 375 | 1765 |
| cine | Cine / Film | 234 | 1378 |
| comerc. | Comercio / Commerce | 573 | 578 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 28 | 385 |
| constr. | Construcción / Construction | 509 | 361 |
| conta. | Contabilidad / Accounting | 50 | 441 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 308 | 280 |
| dep. | Deporte / Sports | 979 | 1012 |
| drogas | Drogas / Drugs | 82 | 297 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 270 | 775 |
| econ. | Economía y dirección de empresas / Economy | 474 | 990 |
| edit. | Industria editorial / Publishing | 76 | 286 |
| edu. | Educación / Education | 429 | 1312 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 332 | 756 |
| enol. | Enología / Oenology | 56 | 133 |
| entom. | Entomología / Entomology | 124 | 119 |
| esot. | Esoterismo / Esotericism | 47 | 262 |
| espac. | Astronáutica y exploración espacial / Astronautics | 41 | 375 |
| espec. | Término especial / Specialized Term | 22 | 396 |
| estad. | Estadística / Statistics | 48 | 390 |
| etno. | Etnología / Ethnology | 467 | 301 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 227 | 868 |
| farm. | Farmacia / Pharmacy | 314 | 312 |
| ferro | Ferrocarril / Rail | 114 | 239 |
| filat. | Filatelia / Philately | 9 | 66 |
| filos. | Filosofía / Philosophy | 133 | 1035 |
| fin. | Finanzas / Finance | 535 | 624 |
| fís. | Física / Physics | 331 | 873 |
| fonét | Fonética / Phonetics | 15 | 452 |
| foto. | Fotografía / Photography | 64 | 879 |
| gastr. | Gastronomía / Gastronomy, Cooking | 2199 | 708 |
| geogr. | Geografía / Geography | 963 | 940 |
| geol. | Geología / Geology | 244 | 332 |
| heráld. | Heráldica / Heraldry | 3 | 122 |
| herram. | Herramientas / Tools | 424 | 543 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 75 | 121 |
| hipis. | Hipismo / Equestrianism, Horses | 90 | 140 |
| hist. | Historia / History | 436 | 1455 |
| hort. | Horticultura / Horticulture | 124 | 262 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 186 | 117 |
| ind | Industria / Industry | 111 | 547 |
| indum. | Indumentaria / Clothing, Fashion | 920 | 491 |
| ingen. | Ingeniería / Engineering | 41 | 1042 |
| inmue. | Inmuebles / Real Estate | 179 | 251 |
| internet | Internet / Internet | 155 | 1562 |
| juego | Juegos / Games | 147 | 991 |
| juguetes | Juguetes / Toys | 50 | 245 |
| jur. | Jurisprudencia / Law | 1145 | 634 |
| ling. | Lingüística / Linguistics | 656 | 1542 |
| lit. | Literatura / Literature | 358 | 1345 |
| loc. | Locución / Idiom | 26 | 708 |
| market. | Marketing / Marketing, Advertising | 44 | 577 |
| mat. | Matemáticas / Mathematics | 388 | 904 |
| material | Ciencia de materiales / Materials Science | 100 | 316 |
| med. | Medicina / Medicine | 2774 | 905 |
| meteo. | Meteorología / Meteorology | 337 | 252 |
| micol. | Micología / Mycology | 29 | 124 |
| mil. | Militar / Military | 442 | 450 |
| miner. | Minería / Mining & Drilling | 43 | 119 |
| mineral. | Mineralogía / Mineralogy | 85 | 168 |
| mitol. | Mitología / Mythology | 337 | 555 |
| moneda | Monedas / Currencies | 43 | 285 |
| mont. | Montañismo / Climbing, Mountaineering | 146 | 277 |
| mueb. | Muebles / Furniture | 271 | 251 |
| mús. | Música / Music | 503 | 1859 |
| náut. | Náutica / Nautical Science | 403 | 234 |
| neol. | Neologismos / Neologisms | 4 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 27 | 196 |
| odont. | Odontología / Dental Medicine | 234 | 138 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 128 |
| onomást. | Onomástica / Names of Persons | 26 | 245 |
| ópt | Óptica / Optics | 70 | 187 |
| orn. | Ornitología / Ornithology | 1453 | 163 |
| period. | Periodismo / Journalism | 81 | 478 |
| pol. | Política / Politics | 811 | 1075 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 1554 | 623 |
| proverb. | Proverbio / Proverb | 77 | 659 |
| psico. | Psicología / Psychology | 634 | 991 |
| quím. | Química / Chemistry | 834 | 600 |
| relig. | Religión / Religion | 763 | 737 |
| reloj | Relojes / Watches, Clocks | 29 | 219 |
| retór. | Retórica / Rhetoric | 11 | 435 |
| seguro | Seguro / Insurance | 54 | 182 |
| silv. | Silvicultura / Forestry | 75 | 185 |
| sociol. | Sociología / Sociology | 296 | 596 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 2730 | 20 |
| teatro | Teatro / Theatre | 143 | 536 |
| tec. | Tecnología / Technology | 566 | 1390 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 73 | 277 |
| telecom. | Telecomunicación / Telecommunications | 167 | 570 |
| textil | Textil / Textiles, Textile Industry | 190 | 173 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 494 | 1781 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 78 | 304 |
| trá. | Tráfico / Traffic | 251 | 346 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 241 | 369 |
| tur. | Turismo, hostelería / Travel Industry | 164 | 568 |
| TV | Televisión y radio / Radio and Television | 117 | 584 |
| UE | Unión Europea / European Union | 10 | 732 |
| unid. | Unidades de medida / Units, Measures, Weights | 72 | 460 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 4 | 293 |
| urban. | Urbanismo / Urban Planning | 128 | 260 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 75 | 178 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 55 | 739 |
| zool. | Zoología / Zoology, Animals | 1365 | 704 |
