D.m.

Doctor of Management (D. M.) is an academic degree awarded on the basis of advanced study and research in management.It is awarded by many American universities, and is equivalent to a PhD degree in management and business-related sciences. To be admitted as a doctoral student, one must hold a Master's Degree and pass a comprehensive entrance exam. The student must complete necessary course work, taught examinable courses, perform independent research under supervision of a qualified Doctoral Advisor, and pass a thesis defence. The D. M. may take four years (full time) to complete and has compulsory taught components and coursework/projects.
See more at Wikipedia.org...

Deutsche Mark, mark, unit of currency in Germany

inst., instant, present month

D.M., German mark, former unit of currency in Germany

God willing