J

1.

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.

Noun	1.	J - 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 Synonyms: joule, watt second
	2.	J - 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].

energy unit, erg, heat unit, joule, watt second, work unit