The Collaborative International Dictionary of English v.0.48:

CD-R \CD-R\ n. [from Compact Disk-Recordable.]
   a recordable compact disk; a compact disc on which you can
   write only once and thereafter is read-only.

   Syn: compact disc recordable, CD-WO, compact disc write-once.
        [WordNet 1.5]

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

CDR
       Contents of the Decrement Register (IBM, ELISP, CAR)


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

CDR
       Compact Disk - Recordable (CD), "CD-R"


The Jargon File (version 4.4.7, 29 Dec 2003):

cdr
 /ku'dr/, /kuh?dr/, vt.

    [from LISP] To skip past the first item from a list of things (generalized
    from the LISP operation on binary tree structures, which returns a list
    consisting of all but the first element of its argument). In the form cdr
    down, to trace down a list of elements: ?Shall we cdr down the agenda??
    Usage: silly. See also loop through.

    Historical note: The instruction format of the IBM 704 that hosted the
    original LISP implementation featured two 15-bit fields called the address
    and decrement parts. The term cdr was originally Contents of Decrement part
    of Register. Similarly, car stood for Contents of Address part of Register.

    The cdr and car operations have since become bases for formation of
    compound metaphors in non-LISP contexts. GLS recalls, for example, a
    programming project in which strings were represented as linked lists; the
    get-character and skip-character operations were of course called CHAR and
    CHDR.


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

CDR

   1.  Committed Data Rate.

   2.  Compact Disc Recordable (CD-R).

   3.  Call Data Record.


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

Contents of Decrement part of Register
cdr

    (cdr) /ku'dr/ or /kuh'dr/ The right-hand element of
   a Lisp cons cell.

   (2014-11-09)