The correct spelling is 'Minitel'. It's a sort of proprietary, very old telephone terminal with no graphics, developped by France Telecom, and dates from before even BBS. I think Minitel also had an ancient form of websites, as well as e-mail. I heard that FT and BT are widely hated in their respective contries, althout I'm not sure why (correct me if I'm wrong).
France is not the only country that attempts to find native words. Germany, Russia and Iceland are making some efforts as well, I've heard. In German, the word 'disk space' is 'Speicher', and 'saving' is 'speichern'.