What's the job of any railways in the world?

...To run trains, not run schools. Indeed, other than India, Bangladesh, Pakistan and Uganda, there is no other place where railways run schools

G Huddleston was Chief Superintendent of East Indian Railway. In 1906, he published a book (publishers were Thacker, Spink and Company, Calcutta), History of the East Indian Railway.  One of the chapters is titled “Hill School”. East Indian Railway Company (EIRC) was set up in 1845 and built many lines we know about. On December 31, 1879, the government bought/nationalised EIRC, but lines were leased to EIRC (till 1919) so that the company could continue to run trains on them. The first paragraph of the chapter states, “On the purchase of the undertaking by Government on 1st January, 1880, it