  In this paper, we show that projective special linear groups $S:=L_3(q)$ with
$q$ less than $100$ are uniquely determined by their orders and degree patterns
of their prime graphs. Indeed, we prove that if $G$ is a finite group whose
order and degree pattern of its prime graph is the same as the order and the
degree pattern of $S$, then $G$ is isomorphic to $S$.
