In this paper, we have given some classes of groups that are not sets, such as the classes of torsion abelian groups, abelian groups, torsion-free non-abelian groups, non-abelian groups.

• 本文给出一些不是集合的群类,如扭阿贝尔群,无扭非阿贝尔群、非阿贝尔群。