rd

from The Collaborative International Dictionary of English v.0.48

RD \R&D\ ([aum]r"[a^]n*d[=e]"), n. [research and development.]
   Research and development; used mostly to refer to the
   division of a corporation responsible for performing research
   and developing new products, or the activitie performed by
   that division; -- a commonly used abbreviation.

   Syn: R and D, research and development. [PJC]

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

RD
       Receive Data (MODEM)

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

RD
       Recursive Design (CASE)

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

RD
       Remove Directory (DOS, OS/2)

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

RD
       Research and Development, "R&D"

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

RD
       Route Descriptor