Subject  | Description | Entries | Users |
| admin. | Administración (pública) / (Public) Administration | 67 | 435 |
| aero. | Aeronáutica / Aviation | 170 | 502 |
| agr. | Agricultura / Agriculture, Aquaculture | 271 | 305 |
| aliment. | Industria alimentaria / Foodstuffs Industry | 84 | 317 |
| anat. | Anatomía / Human Anatomy | 603 | 550 |
| armadura | Armadura / Historic Armour | 12 | 154 |
| armas | Armas / Weapons | 205 | 413 |
| arq. | Arquitectura / Architecture | 219 | 509 |
| arqueol. | Arqueología / Archaeology | 46 | 389 |
| arte | Arte / Art | 119 | 1255 |
| astron. | Astronomía / Astronomy | 160 | 662 |
| audio | Audiología / Audiology | 13 | 220 |
| automov. | Términos automovilísticos / Automotive Engineering | 148 | 523 |
| baile | Baile / Dance | 28 | 403 |
| bibl. | Bíblico / Biblical | 18 | 405 |
| biblio. | Biblioteconomía / Library Science | 8 | 201 |
| bici. | Bicicleta / Bicycle | 40 | 541 |
| biochem. | Bioquímica / Biochemistry | 210 | 351 |
| biol. | Biología / Biology | 467 | 717 |
| biotec. | Biotecnología / Biotechnology | 8 | 305 |
| Bolsa | Bolsa / Stock Exchange | 27 | 271 |
| Bomberos | Bomberos & Urgencias / Firefighting & Rescue | 11 | 139 |
| bot. | Botánica, plantas / Botany, Plants | 808 | 426 |
| caza | Caza / Hunting | 31 | 136 |
| cerv. | Elaboración de cerveza / Brewing | 9 | 170 |
| ciencia | Ciencia / Academic Disciplines | 251 | 1702 |
| cine | Cine / Film | 142 | 1341 |
| comerc. | Comercio / Commerce | 254 | 568 |
| cómics | Cómics y animaciónes / Comics and Animated Cartoons | 27 | 369 |
| constr. | Construcción / Construction | 112 | 353 |
| conta. | Contabilidad / Accounting | 10 | 433 |
| cosm. | Cosmética y cuidado del cuerpo / Cosmetics & Body Care | 99 | 269 |
| dep. | Deporte / Sports | 502 | 988 |
| drogas | Drogas / Drugs | 47 | 286 |
| ecol. | Ecología, Medio ambiente / Ecology, Environment | 115 | 759 |
| econ. | Economía y dirección de empresas / Economy | 197 | 965 |
| edit. | Industria editorial / Publishing | 28 | 273 |
| edu. | Educación / Education | 170 | 1276 |
| electr. | Electrónica, ingeniería eléctrica / Electrical Engin., Electronics | 153 | 733 |
| enol. | Enología / Oenology | 34 | 130 |
| entom. | Entomología / Entomology | 104 | 113 |
| esot. | Esoterismo / Esotericism | 30 | 250 |
| espac. | Astronáutica y exploración espacial / Astronautics | 36 | 363 |
| espec. | Término especial / Specialized Term | 7 | 385 |
| estad. | Estadística / Statistics | 19 | 373 |
| etno. | Etnología / Ethnology | 417 | 292 |
| F | Obras de ficción / Fiction: Names and Titles in Literature, Film, TV, Arts | 177 | 841 |
| farm. | Farmacia / Pharmacy | 267 | 306 |
| ferro | Ferrocarril / Rail | 54 | 228 |
| filat. | Filatelia / Philately | 6 | 65 |
| filos. | Filosofía / Philosophy | 81 | 1001 |
| fin. | Finanzas / Finance | 200 | 607 |
| fís. | Física / Physics | 241 | 847 |
| fonét | Fonética / Phonetics | 13 | 434 |
| foto. | Fotografía / Photography | 38 | 855 |
| gastr. | Gastronomía / Gastronomy, Cooking | 1537 | 688 |
| geogr. | Geografía / Geography | 663 | 914 |
| geol. | Geología / Geology | 159 | 323 |
| heráld. | Heráldica / Heraldry | 2 | 117 |
| herram. | Herramientas / Tools | 155 | 520 |
| hidro. | Hidrología y hidrogeología / Hydrology & Hydrogeology | 32 | 115 |
| hipis. | Hipismo / Equestrianism, Horses | 72 | 135 |
| hist. | Historia / History | 301 | 1407 |
| hort. | Horticultura / Horticulture | 82 | 253 |
| ictiol. | Ictiología / Ichthyology, fish, fishing | 156 | 115 |
| ind | Industria / Industry | 77 | 528 |
| indum. | Indumentaria / Clothing, Fashion | 354 | 471 |
| ingen. | Ingeniería / Engineering | 17 | 997 |
| inmue. | Inmuebles / Real Estate | 29 | 246 |
| internet | Internet / Internet | 55 | 1522 |
| juego | Juegos / Games | 81 | 954 |
| juguetes | Juguetes / Toys | 37 | 235 |
| jur. | Jurisprudencia / Law | 427 | 617 |
| ling. | Lingüística / Linguistics | 462 | 1490 |
| lit. | Literatura / Literature | 243 | 1300 |
| loc. | Locución / Idiom | 29 | 708 |
| market. | Marketing / Marketing, Advertising | 5 | 565 |
| mat. | Matemáticas / Mathematics | 263 | 862 |
| material | Ciencia de materiales / Materials Science | 18 | 304 |
| med. | Medicina / Medicine | 1684 | 881 |
| meteo. | Meteorología / Meteorology | 192 | 242 |
| micol. | Micología / Mycology | 25 | 120 |
| mil. | Militar / Military | 272 | 439 |
| miner. | Minería / Mining & Drilling | 29 | 117 |
| mineral. | Mineralogía / Mineralogy | 65 | 160 |
| mitol. | Mitología / Mythology | 309 | 538 |
| moneda | Monedas / Currencies | 32 | 277 |
| mont. | Montañismo / Climbing, Mountaineering | 22 | 271 |
| mueb. | Muebles / Furniture | 115 | 240 |
| mús. | Música / Music | 364 | 1810 |
| náut. | Náutica / Nautical Science | 282 | 228 |
| neol. | Neologismos / Neologisms | 3 | 194 |
| nucl. | Ingeniería Nuclear / Nuclear Engineering | 13 | 192 |
| odont. | Odontología / Dental Medicine | 54 | 136 |
| ofensivo | Comentario ofensivo o insultante / Offensive or Pejorative Terms, Expletives | 5 | 128 |
| onomást. | Onomástica / Names of Persons | 26 | 232 |
| ópt | Óptica / Optics | 34 | 183 |
| orn. | Ornitología / Ornithology | 1062 | 155 |
| period. | Periodismo / Journalism | 43 | 466 |
| pol. | Política / Politics | 393 | 1042 |
| prof. | Profesión y trabajo / Jobs, Employment Market | 939 | 602 |
| proverb. | Proverbio / Proverb | 65 | 647 |
| psico. | Psicología / Psychology | 222 | 958 |
| quím. | Química / Chemistry | 716 | 579 |
| relig. | Religión / Religion | 592 | 714 |
| reloj | Relojes / Watches, Clocks | 23 | 214 |
| retór. | Retórica / Rhetoric | 3 | 425 |
| seguro | Seguro / Insurance | 11 | 179 |
| silv. | Silvicultura / Forestry | 48 | 181 |
| sociol. | Sociología / Sociology | 64 | 578 |
| T | T / Taxonomic terms for animals, plants and fungi (incl. varieties and breeds) | 2084 | 15 |
| teatro | Teatro / Theatre | 78 | 519 |
| tec. | Tecnología / Technology | 198 | 1335 |
| TecMed. | Tecnología Médica / Medical Engineering & Imaging | 28 | 271 |
| telecom. | Telecomunicación / Telecommunications | 65 | 557 |
| textil | Textil / Textiles, Textile Industry | 86 | 165 |
| TIC | Tecnologías de información y comunicación / Computer Sciences | 183 | 1719 |
| tipograf | Impresión, Tipografía, Diseño / Print, Typography, Layout | 22 | 290 |
| trá. | Tráfico / Traffic | 72 | 337 |
| transp. | Transporte (por tierra) / Transportation (Land Transport) | 54 | 359 |
| tur. | Turismo, hostelería / Travel Industry | 45 | 554 |
| TV | Televisión y radio / Radio and Television | 63 | 571 |
| UE | Unión Europea / European Union | 5 | 701 |
| unid. | Unidades de medida / Units, Measures, Weights | 67 | 448 |
| UPM | UNESCO Patrimonio Mundial / UNESCO World Heritage | 2 | 278 |
| urban. | Urbanismo / Urban Planning | 59 | 248 |
| VetMed. | Medicina veterinaria / Veterinary Medicine | 39 | 175 |
| VocViaje | Vocabulario Viajes / Travellers vocabulary | 6 | 721 |
| zool. | Zoología / Zoology, Animals | 1048 | 685 |
