meaning of cdf
1. CDF Common Data Format. A library and toolkit for multi-dimensional data sets. CD-i Compact Disc interactive CDIF CASE Data Interchange Format CDL 1. Computer Definition [Design?] Language. A hardware description language. "Computer Organisation and Microprogramming", Yaohan Chu, P-H 1970. 2. Command Definition Language. Portion of ICES used to implement commands. Sammet 1969, p. 618-620. 3. Compiler Description Language. C. H. A. Koster, 1969. Intended for implementation of the rules of an affix grammar by recursive procedures. A procedure may be a set of tree-structured alternatives, each alternative is executed until one successfully exits. Used in a portable COBOL-74 compiler from MPB, mprolog system from SzKI, and the Mephisto chess computer. "CDL: A Compiler Implementation Language", in Methods of Algorithmic Language Implementation, C. H. A. Koster, LNCS 47, Springer 1977, pp. 341-351. "Using the CDL Compiler Compiler", C. H. A. Koster, 1974. Versions: CDL2, CDLM used at Manchester. 4. Common Design Language. "Common Design Language", IBM, Software Engineering Inst, Sept 1983. 5. Control Definition Language. Ideas which contributed to Smalltalk. ["Control Structures for Programming Languges", David A. Fisher, PhD Thesis, CMU 1970]. CDM 1. Content Data Model 2. Code Division Multiplexing CDMA Code Division Multiple Access CDP1802 RCA 1802 CDPD Cellular Digital Packet Data cdr /kudr/ or /kuhdr/ [LISP] To skip past the first item from a list of things generalised 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 7090 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. [Jargon File]
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