Answer: SCS

AnswerCrossword Clue
SCSGraduated series: Abbr.
SCSBiol. and chem., for two
SCSMus. sequences
SCSMonogram of "Les Girls" producer
SCSBiol. and chem.
SCSAct pts.
SCSPlaywrights' divs.
SCSChem., geol., etc.
SCSWeighers: Abbr.
SCSParts of acts: Abbr.
SCSSings nonsense
SCSPhysics and others: Abbr.
SCSParts of plays: Abbr.
SCSCourses of study: Abbr.
SCSPlay parts: Abbr.
SCSBalances: Abbr.
SCSCertain finger exercises: Abbr.
SCSSciences: Abbr.
SCSScales: Abbr.
SCSDerides