Transport express régional
Transport express régional (French pronunciation: [tʁɑ̃spɔʁ ɛksprɛs ʁeʒjɔnal], usually shortened to TER) is the brand name used by the SNCF, the French national railway company, to denote rail service run by the regional councils of France, specifically their organised transport authorities. The network serves French regions; Île-de-France (Transilien) and Corsica (CFC) have their own specific transport systems.
Source: Wikipedia — Transport express régional (CC BY-SA 4.0)