RDL

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

RDL

   Requirements and Development Language.

   ["RDL: A Language for Software Development", H.C. Heacox,
   SIGPLAN Notices 14(9):71-79 (Sep 1979)].

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

RDL
       Remote Digital Loopback

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

RDL
       Relational Database Language (DB)