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

DSU
       Data Secure Unix (Unix, OS, UCLA)


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

DSU
       Digital Service Unit (ATM)


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

DSU
       Digital Storage Unit


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

DSU
       Distribution Service Unit (IBM, SNADS)


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

DSU

   1.  Data Service Unit.

   2. Disk Subsystem Unit (Artecon).

   3.  Dwarf Storage Unit.

   (1996-12-01)