D&M

D&M stands for Detection and Monitoring (US DoD) D&M stands for Development and Management D&M stands for Deep and Meaningful (conversation) D&M stands for Drilling and Measurements D&M stands for Dressed & Matched

D&A

D&A stands for Drug and Alcohol D&A stands for Depreciation and Amortization D&A stands for Design & Analysis D&A stands for Detection & Alarm (safety; various companies) D&A stands for Data and Analysis D&A stands for Delivery and Acceptance D&A stands for Dry & Abandoned (oil & gas industry) D&A stands for Deals and Allowances

C. Diff

C. Diff  stands for Clostridium difficile (bacterium; also seen as C. Difficile)

C. Th.

C. Th.  stands for Codex Theodosianus (Latin: Theodosius Codex, Codices And Manuscripts)

C.CA

C.CA stands for Conjugi Carissimae (Latin: To the Dearest Spouse, epigraphy)

C.CLIN

C.CLIN stands for Centres de Coordination de la Lutte contre les Infections Nosocomiales