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

NSI
       Name Service Independent (DCE/RPC, CDS)


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

NSI
       Network Store Interface (MS, Windows)


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

NSI
       NASA Science Internet (NASA, network)


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

Network Solutions, Inc.
NSI

    (NSI) One of the three companies that provide and
   coordinate InterNIC services for the NSFNet.  NSI is
   responsible for registration.  NSI has been bought by, and is
   now a wholly-owned subsidiary of, Science Applications
   International Corporation (SAIC).

   (1995-11-09)