Among these services, there are two large systems which operate both inside and outside the city limits of Barcelona: the commuter train lines operated by Renfe, amalgamated in the Rodalies Barcelona, or Ferrocarrils de la Generalitat de Catalunya lines which start in the metro lines the company operates (L6, L7 and L8) and which become a fully-fledged railway system which serves most of the metropolitan area: list of FGC lines.