Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 102 | 445 |
| aero. | Aeronáutica / Aviation | 213 | 511 |
| agr. | Agricultura / Agriculture, Aquaculture | 352 | 308 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 117 | 322 |
| anat. | Anatomía / Human Anatomy | 678 | 557 |
| armadura | Armadura / Historic Armour | 12 | 160 |
| armas | Armas / Weapons | 221 | 419 |
| arq. | Arquitectura / Architecture | 317 | 519 |
| arqueol. | Arqueología / Archaeology | 57 | 395 |
| arte | Arte / Art | 172 | 1281 |
| astron. | Astronomía / Astronomy | 219 | 673 |
| audio | Audiología / Audiology | 19 | 229 |
| automov. | Términos automovilísticos / Automotive Engineering | 319 | 536 |
| baile | Baile / Dance | 37 | 409 |
| bibl. | Bíblico / Biblical | 18 | 414 |
| biblio. | Biblioteconomía / Library Science | 9 | 205 |
| bici. | Bicicleta / Bicycle | 91 | 555 |
| biol. | Biología / Biology | 571 | 730 |
| bioquím. | Bioquímica / Biochemistry | 232 | 358 |
| biotec. | Biotecnología / Biotechnology | 9 | 309 |
| Bolsa | Bolsa / Stock Exchange | 58 | 278 |
| BomUrg | Bomberos & Urgencias / Firefighting & Rescue | 34 | 146 |
| bot. | Botánica, plantas / Botany, Plants | 910 | 436 |
| caza | Caza / Hunting | 42 | 136 |
| cerv. | Elaboración de cerveza / Brewing | 16 | 172 |
| ciencia | Ciencia / Academic Disciplines | 312 | 1743 |
| cine | Cine / Film | 186 | 1364 |
| comerc. | Comercio / Commerce | 352 | 576 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 27 | 378 |
| constr. | Construcción / Construction | 173 | 357 |
| conta. | Contabilidad / Accounting | 13 | 439 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 127 | 275 |
| dep. | Deporte / Sports | 634 | 1005 |
| drogas | Drogas / Drugs | 55 | 295 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 205 | 771 |
| econ. | Economía y dirección de empresas / Economy | 301 | 986 |
| edit. | Industria editorial / Publishing | 39 | 280 |
| edu. | Educación / Education | 263 | 1300 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 226 | 749 |
| enol. | Enología / Oenology | 47 | 130 |
| entom. | Entomología / Entomology | 114 | 116 |
| esot. | Esoterismo / Esotericism | 32 | 253 |
| espac. | Astronáutica y exploración espacial / Astronautics | 39 | 373 |
| espec. | Término especial / Specialized Term | 17 | 393 |
| estad. | Estadística / Statistics | 43 | 383 |
| etno. | Etnología / Ethnology | 430 | 295 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 183 | 857 |
| farm. | Farmacia / Pharmacy | 296 | 310 |
| ferro | Ferrocarril / Rail | 83 | 237 |
| filat. | Filatelia / Philately | 6 | 65 |
| filos. | Filosofía / Philosophy | 108 | 1024 |
| fin. | Finanzas / Finance | 306 | 618 |
| fís. | Física / Physics | 297 | 866 |
| fonét | Fonética / Phonetics | 13 | 446 |
| foto. | Fotografía / Photography | 44 | 866 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1787 | 700 |
| geogr. | Geografía / Geography | 788 | 929 |
| geol. | Geología / Geology | 208 | 331 |
| heráld. | Heráldica / Heraldry | 3 | 120 |
| herram. | Herramientas / Tools | 216 | 534 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 52 | 117 |
| hipis. | Hipismo / Equestrianism, Horses | 77 | 139 |
| hist. | Historia / History | 376 | 1436 |
| hort. | Horticultura / Horticulture | 96 | 256 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 181 | 116 |
| ind | Industria / Industry | 101 | 542 |
| indum. | Indumentaria / Clothing, Fashion | 459 | 483 |
| ingen. | Ingeniería / Engineering | 27 | 1027 |
| inmue. | Inmuebles / Real Estate | 88 | 249 |
| internet | Internet / Internet | 83 | 1549 |
| juego | Juegos / Games | 89 | 980 |
| juguetes | Juguetes / Toys | 47 | 242 |
| jur. | Jurisprudencia / Law | 674 | 628 |
| ling. | Lingüística / Linguistics | 506 | 1521 |
| lit. | Literatura / Literature | 270 | 1331 |
| loc. | Locución / Idiom | 27 | 708 |
| market. | Marketing / Marketing, Advertising | 26 | 574 |
| mat. | Matemáticas / Mathematics | 320 | 891 |
| material | Ciencia de materiales / Materials Science | 38 | 311 |
| med. | Medicina / Medicine | 2167 | 893 |
| meteo. | Meteorología / Meteorology | 254 | 247 |
| micol. | Micología / Mycology | 25 | 123 |
| mil. | Militar / Military | 364 | 445 |
| miner. | Minería / Mining & Drilling | 38 | 118 |
| mineral. | Mineralogía / Mineralogy | 74 | 163 |
| mitol. | Mitología / Mythology | 321 | 545 |
| moneda | Monedas / Currencies | 36 | 281 |
| mont. | Montañismo / Climbing, Mountaineering | 90 | 274 |
| mueb. | Muebles / Furniture | 155 | 245 |
| mús. | Música / Music | 405 | 1842 |
| náut. | Náutica / Nautical Science | 346 | 231 |
| neol. | Neologismos / Neologisms | 4 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 23 | 196 |
| odont. | Odontología / Dental Medicine | 78 | 137 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 128 |
| onomást. | Onomástica / Names of Persons | 26 | 240 |
| ópt | Óptica / Optics | 53 | 186 |
| orn. | Ornitología / Ornithology | 1327 | 160 |
| period. | Periodismo / Journalism | 57 | 474 |
| pol. | Política / Politics | 565 | 1066 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 1226 | 613 |
| proverb. | Proverbio / Proverb | 65 | 655 |
| psico. | Psicología / Psychology | 326 | 977 |
| quím. | Química / Chemistry | 791 | 592 |
| relig. | Religión / Religion | 672 | 730 |
| reloj | Relojes / Watches, Clocks | 24 | 216 |
| retór. | Retórica / Rhetoric | 4 | 430 |
| seguro | Seguro / Insurance | 21 | 181 |
| silv. | Silvicultura / Forestry | 53 | 182 |
| sociol. | Sociología / Sociology | 135 | 589 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 2592 | 17 |
| teatro | Teatro / Theatre | 105 | 529 |
| tec. | Tecnología / Technology | 345 | 1371 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 46 | 273 |
| telecom. | Telecomunicación / Telecommunications | 99 | 566 |
| textil | Textil / Textiles, Textile Industry | 111 | 169 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 254 | 1763 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 26 | 299 |
| trá. | Tráfico / Traffic | 138 | 340 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 104 | 365 |
| tur. | Turismo, hostelería / Travel Industry | 96 | 566 |
| TV | Televisión y radio / Radio and Television | 77 | 578 |
| UE | Unión Europea / European Union | 10 | 724 |
| unid. | Unidades de medida / Units, Measures, Weights | 68 | 456 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 3 | 288 |
| urban. | Urbanismo / Urban Planning | 96 | 257 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 50 | 176 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 32 | 734 |
| zool. | Zoología / Zoology, Animals | 1284 | 697 |
