Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 67 | 436 |
| aero. | Aeronáutica / Aviation | 170 | 505 |
| agr. | Agricultura / Agriculture, Aquaculture | 271 | 306 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 84 | 319 |
| anat. | Anatomía / Human Anatomy | 606 | 551 |
| armadura | Armadura / Historic Armour | 12 | 154 |
| armas | Armas / Weapons | 207 | 413 |
| arq. | Arquitectura / Architecture | 219 | 510 |
| arqueol. | Arqueología / Archaeology | 46 | 390 |
| arte | Arte / Art | 119 | 1257 |
| astron. | Astronomía / Astronomy | 160 | 664 |
| audio | Audiología / Audiology | 13 | 222 |
| automov. | Términos automovilísticos / Automotive Engineering | 148 | 524 |
| baile | Baile / Dance | 28 | 404 |
| bibl. | Bíblico / Biblical | 18 | 407 |
| biblio. | Biblioteconomía / Library Science | 8 | 202 |
| bici. | Bicicleta / Bicycle | 40 | 543 |
| biol. | Biología / Biology | 467 | 719 |
| bioquím. | Bioquímica / Biochemistry | 210 | 353 |
| biotec. | Biotecnología / Biotechnology | 8 | 306 |
| Bolsa | Bolsa / Stock Exchange | 27 | 272 |
| BomUrg | Bomberos & Urgencias / Firefighting & Rescue | 11 | 140 |
| bot. | Botánica, plantas / Botany, Plants | 808 | 427 |
| caza | Caza / Hunting | 31 | 136 |
| cerv. | Elaboración de cerveza / Brewing | 9 | 170 |
| ciencia | Ciencia / Academic Disciplines | 251 | 1705 |
| cine | Cine / Film | 142 | 1343 |
| comerc. | Comercio / Commerce | 254 | 570 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 27 | 370 |
| constr. | Construcción / Construction | 112 | 354 |
| conta. | Contabilidad / Accounting | 10 | 434 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 99 | 270 |
| dep. | Deporte / Sports | 502 | 990 |
| drogas | Drogas / Drugs | 47 | 287 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 115 | 761 |
| econ. | Economía y dirección de empresas / Economy | 197 | 968 |
| edit. | Industria editorial / Publishing | 28 | 275 |
| edu. | Educación / Education | 170 | 1278 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 153 | 735 |
| enol. | Enología / Oenology | 34 | 130 |
| entom. | Entomología / Entomology | 104 | 114 |
| esot. | Esoterismo / Esotericism | 30 | 250 |
| espac. | Astronáutica y exploración espacial / Astronautics | 36 | 364 |
| espec. | Término especial / Specialized Term | 7 | 387 |
| estad. | Estadística / Statistics | 19 | 374 |
| etno. | Etnología / Ethnology | 417 | 292 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 177 | 842 |
| farm. | Farmacia / Pharmacy | 267 | 307 |
| ferro | Ferrocarril / Rail | 54 | 230 |
| filat. | Filatelia / Philately | 6 | 65 |
| filos. | Filosofía / Philosophy | 81 | 1004 |
| fin. | Finanzas / Finance | 200 | 608 |
| fís. | Física / Physics | 241 | 849 |
| fonét | Fonética / Phonetics | 13 | 436 |
| foto. | Fotografía / Photography | 38 | 858 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1537 | 689 |
| geogr. | Geografía / Geography | 665 | 917 |
| geol. | Geología / Geology | 160 | 325 |
| heráld. | Heráldica / Heraldry | 2 | 117 |
| herram. | Herramientas / Tools | 155 | 521 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 32 | 116 |
| hipis. | Hipismo / Equestrianism, Horses | 73 | 136 |
| hist. | Historia / History | 302 | 1410 |
| hort. | Horticultura / Horticulture | 82 | 254 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 156 | 115 |
| ind | Industria / Industry | 77 | 530 |
| indum. | Indumentaria / Clothing, Fashion | 355 | 473 |
| ingen. | Ingeniería / Engineering | 18 | 1000 |
| inmue. | Inmuebles / Real Estate | 29 | 247 |
| internet | Internet / Internet | 55 | 1524 |
| juego | Juegos / Games | 81 | 956 |
| juguetes | Juguetes / Toys | 37 | 236 |
| jur. | Jurisprudencia / Law | 427 | 619 |
| ling. | Lingüística / Linguistics | 462 | 1492 |
| lit. | Literatura / Literature | 243 | 1303 |
| loc. | Locución / Idiom | 29 | 708 |
| market. | Marketing / Marketing, Advertising | 5 | 567 |
| mat. | Matemáticas / Mathematics | 264 | 866 |
| material | Ciencia de materiales / Materials Science | 18 | 305 |
| med. | Medicina / Medicine | 1687 | 884 |
| meteo. | Meteorología / Meteorology | 192 | 243 |
| micol. | Micología / Mycology | 25 | 121 |
| mil. | Militar / Military | 274 | 439 |
| miner. | Minería / Mining & Drilling | 29 | 118 |
| mineral. | Mineralogía / Mineralogy | 65 | 161 |
| mitol. | Mitología / Mythology | 309 | 540 |
| moneda | Monedas / Currencies | 32 | 279 |
| mont. | Montañismo / Climbing, Mountaineering | 22 | 271 |
| mueb. | Muebles / Furniture | 115 | 242 |
| mús. | Música / Music | 365 | 1813 |
| náut. | Náutica / Nautical Science | 282 | 230 |
| neol. | Neologismos / Neologisms | 3 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 13 | 193 |
| odont. | Odontología / Dental Medicine | 54 | 137 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 128 |
| onomást. | Onomástica / Names of Persons | 26 | 234 |
| ópt | Óptica / Optics | 34 | 185 |
| orn. | Ornitología / Ornithology | 1062 | 156 |
| period. | Periodismo / Journalism | 43 | 468 |
| pol. | Política / Politics | 393 | 1046 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 939 | 603 |
| proverb. | Proverbio / Proverb | 65 | 649 |
| psico. | Psicología / Psychology | 222 | 961 |
| quím. | Química / Chemistry | 725 | 581 |
| relig. | Religión / Religion | 592 | 717 |
| reloj | Relojes / Watches, Clocks | 23 | 215 |
| retór. | Retórica / Rhetoric | 3 | 427 |
| seguro | Seguro / Insurance | 11 | 179 |
| silv. | Silvicultura / Forestry | 48 | 182 |
| sociol. | Sociología / Sociology | 64 | 580 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 2084 | 16 |
| teatro | Teatro / Theatre | 78 | 519 |
| tec. | Tecnología / Technology | 199 | 1340 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 28 | 272 |
| telecom. | Telecomunicación / Telecommunications | 66 | 558 |
| textil | Textil / Textiles, Textile Industry | 86 | 166 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 183 | 1724 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 22 | 292 |
| trá. | Tráfico / Traffic | 72 | 338 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 54 | 360 |
| tur. | Turismo, hostelería / Travel Industry | 45 | 557 |
| TV | Televisión y radio / Radio and Television | 63 | 573 |
| UE | Unión Europea / European Union | 5 | 704 |
| unid. | Unidades de medida / Units, Measures, Weights | 67 | 450 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 2 | 280 |
| urban. | Urbanismo / Urban Planning | 59 | 249 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 39 | 176 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 6 | 723 |
| zool. | Zoología / Zoology, Animals | 1049 | 686 |
