Italy : Private railways & industry : S : SFEN: Societá Ferrovia Elettrica Novara, Biella-Novara

Italy : Private railways & industry : S : SFM: Societa Italiana per le strade ferrate meridionali : Rete Adriatica

Italy : Private railways & industry : S : SFM: Societa Italiana per le strade ferrate meridionali : RM: Rete Mediterranea

Italy : Private railways & industry : S : SFM: Servizio Ferroviario Metropolitano Bolognese

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Italy : Private railways & industry : S : SFD: Societá Ferrovia Dolomiti
Italy : Private railways & industry : S : SFS: Strade Ferrate Sovvenzionate