 Ligue 1 is one of two divisions making up the Ligue de Football Professionnel, the other being Ligue Professionnelle 2.The league is contested by 16 clubs, and it operates on a system of promotion and relegation with Ligue 2.In 2009 it was known as Championnat d'Algérie D1 Nedjma and from 2010 to 2014, it was known as Ligue Professionnelle 1 Nedjma as it is sponsored by Kuwaiti telecommunications company Nedjma.