periodically intermittent duty intermittent periodic duty intermodal service international telecommunication service
petroleum intersectional service topspin service topspin serve local service
pooled service medico-legal institute medicolegal institute meteorological institute
meteorological office weather bureau meteorological service weather service
military service combination service monopoly service multimedia information service
multimedia service nomial service aeronautical mobile service aeronautical mobile R service
aeronautical mobile-satellite R service AMS R S aeronautical mobile-satellite R service aeronautical mobile-satellite service
maritime mobile-satellite service mobile satellite service mobile-satellite service land mobile-satellite service
unconfirmed service unconfirmed-service non-confirmed-service ocean service
development-related service employment employment-related service employment service
new money facility periodic duty personal service flat service
flat serve demand telecommunication service demand service satellite service
bearer service postal service after-sale service after-sales service
customer service upstream service trunk service civil service
public service public utility service utility utility service
public utility information handling agency information processing network information utility
subscription data base infonet radar service Radar service terminated
scheduled service scheduled service scheduled service revenue connectionless service
social service receive-only service basic telephone service WATS
WATS service wide area service wide-area telecommunication service optional calling service
Algunos ejemplos : Resolución judicial   Refugiados   Escuela primaria   Agricultura ecológica   Tratamiento del cáncer