SRJ
Stockholm–Roslagens Järnvägar (SRJ) was a private railway company in Sweden 1885–1951, running a vast network of narrow gauge railways in Roslagen north of Stockholm. The company was taken over by Swedish State Railways in 1951, formally fusioned into Swedish State Railways in 1959.
Parts of the SRJ network closest to Stockholm is now used for commuter traffic and called Roslagsbanan, owned by Storstockholms lokaltrafik. The line between Hargshamn and Dannemora has been converted to normal gauge and made part of the national, government owned network. Another part close to Uppsala is used as a heritage railway and called Upsala-Lenna Jernväg. All other parts are now closed.
Read more about SRJ: History