  It has been proposed recently that, in the framework of M(atrix) theory, N=8
supersymmetric U(N) Yang-Mills theory in 1+1 dimensions gives rise to type IIA
long string configurations. We point out that the quantum moduli space of
$SYM_{1+1}$ gives rise to two quantum numbers, which fit very well into the
M(atrix) theory. The two quantum numbers become familiar if one switches to a
IIB picture, where they represent configurations of D-strings and fundamental
strings. We argue that, due to the SL(2,Z) symmetry, of the IIB theory, such
quantum numbers must represent configurations that are present also in the IIA
framework.
