(YA-, after Unix' s yacc - Yet ANOTher Compiler-Compiler) A humorous allusion often used in titles to acknowledge that the topic is NOT original, though the content is. As in "Yet ANOTher AI Group" or "Yet ANOTher {Simulated Annealing} {Algorithm}". If used of others' work, it describes something of which there are already far too many. In hackish acronyms the "YA" prefix almost invariably expands to Yet ANOTher, e.g. YABA, YAUN. [Jargon File] (1996-11-26)