  The description of nilpotent Chernikov $p$-groups with elementary tops is
reduced to the study of tuples of skew-symmetric bilinear forms over the
residue field $\mathbb{F}_p$. If $p\ne2$ and the bottom of the group only
consists of $2$ quasi-cyclic summands, a complete classification is given. We
use the technique of quivers with relations.
