RSN

from Jargon File (4.4.4, 14 Aug 2003)

RSN
 /R.S.N/, adj.

   See {Real Soon Now}.

from The Free On-line Dictionary of Computing (8 July 2008)

Real Soon Now
RSN

   (RSN) [Originally from SF's fanzine community, popularised by
   Jerry Pournelle's column in "BYTE"] 1. Supposed to be
   available (or fixed, or cheap, or whatever) real soon now
   according to somebody, but the speaker is quite skeptical.

   2. When one's gods, fates, or other time commitments permit
   one to get to it (in other words, don't hold your breath).

   [{Jargon File}]

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

RSN
       Real Soon Now (slang)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

RSN
       Robust Security Network (WLAN, cryptography)