V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

DMA
       Direct Memory Access (DMA)


The Free On-line Dictionary of Computing (30 December 2018):

Direct Memory Access
DMA

    (DMA) A facility of some architectures which
   allows a peripheral to read and write memory without
   intervention by the CPU.  DMA is a limited form of bus
   mastering.

   (1996-08-23)