J \J\ (j[=a]).
   J is the tenth letter of the English alphabet. It is a later
   variant form of the Roman letter I, used to express a
   consonantal sound, that is, originally, the sound of English
   y in yet. The forms J and I have, until a recent time, been
   classed together, and they have been used interchangeably.
   [1913 Webster]

   Note: In medical prescriptions j is still used in place of i
         at the end of a number, as a Roman numeral; as, vj,
         xij. J is etymologically most closely related to i, y,
         g; as in jot, iota; jest, gesture; join, jugular, yoke.
         See I. J is a compound vocal consonant, nearly
         equivalent in sound to dzh. It is exactly the same as g
         in gem. See Guide to Pronunciation, [sect][sect] 179,
         211, 239.
         [1913 Webster]

	

	J
     n 1: a unit of electrical energy equal to the work done when a
          current of one ampere passes through a resistance of one
          ohm for one second [syn: joule, watt second]
     2: the 10th letter of the Roman alphabet

	

	J
     
        A derivative and redesign of APL with added features and
        control structures.  J is purely functional with lexical
        scope and more conventional control structures, plus several
        new concepts such as function rank and function arrays.  J
        was designed and developed by Kennneth E. Iverson and Roger
        Hui .  J uses only the ASCII
        character set but has a spelling scheme that retains the
        advantages of APL's special alphabet.  J is a conventional
        procedural programming language but can be used as a purely
        functional language.
     
        Version 4.1 for MS-DOS, Sun, Mac, Archimedes.  Source
        available in C from Iverson Software, +1 (416) 925 6096.
     
        Version 6 package from ISI includes an interpreter and
        tutorial.  Ported to DEC, NeXT, SGI, Sun-3, Sun-4,
        Vax, RS/6000, MIPS, Macintosh, Acorn Archimedes,
        IBM PC, Atari, 3b1, Amiga.
     
        (ftp://watserv1.waterloo.edu/languages/apl/j).
     
        J-mode GNU Emacs macros available by
        (ftp://think.com/pub/j/gmacs/j-interaction-mode.el).
     
        ["APL\?", Roger K.W. Hui et al, APL90 Conf Proc, Quote Quad
        20(4):192-200].
     
        (1992-10-31)