Classroom Building Abbreviations The following abbreviations are used in university correspondence and in all classroom reservations processed by the Office of the Registrar.  They are listed below for reference.   Code Building AR Army ROTC Annex CH Cramer Hall CO Coughlin Hall CU Cudahy Hall DS David Straz Hall (Business Administration) EC Emory Clark Hall (Nursing) EN Engineering Building (both Olin and Haggerty) GM Gymnasium HH Holthusen Hall JH Johnston Hall (Communication) LL Lalumiere Language Hall LS Wehr Life Science Building MH Marquette Hall NR Navy ROTC Annex RC Helfaer Recreation Center RL Raynor Library SC Schroeder Complex SD School of Dentistry SE Sensenbrenner Hall ST Straz Tower SV 707 Building TH Helfaer Theatre TW Todd Wehr Chemistry Building VT Varsity Theatre WW William Wehr Physics Building