MSOL

MSOL may stand for:
 * Master of Science in Organizational Leadership, a business degree
 * Microsoft Online Services
 * Monadic second-order logic, a form of logic in which one can quantify over sets
 * Msol or solar mass, also written as $$M_{\odot}$$, a unit of mass used in astronomy
 * MSOL1 and MSOL2, codes for two Dungeons & Dragons modules