Wikipedia
Wikipedia is becoming the reference regarding Turkish railways knowledge. Quality of content is improving by the day thanks to a large pool of contributors. Wikipedia scope is not bounded and it holds very relevant material to former Ottoman empire railways now in foreign countries.
On the flip side, Wikipedia is lacking consistency in the edits. Content is sometime duplicated, self conflicting and can be difficult to navigate. The Turkish or the German Wikipedia are not structured and edited in the same way as the English one.
Wikipedia is structured by Categorie pages which are used to navigate towards the content pages. Recommended categories are in English Wikipedia:
Infrastructure & networks
Rail infrastructures in Turkey
Companies & Operations
Passenger rail transport in Turkey