This volume is an updated edition of "Schémas en Groupes (SGA 3), volume I (Propriétés Générales des Schémas en Groupes)", Lecture Notes in Mathematics, 151, Springer-Verlag, Berlin-Heidelberg-New York, 1970, by Michel Demazure, Alexandre Grothendieck et al.
This volume introduces the language of representable functors and sheaves and proves general results about group schemes (Exp. I to VII A) and formal groups (Exp. VII_B).