(From the 1930 Sellar and Yeatman parody "1066 And All That") Often capitaliSed alwayS pronounced aS if capitaliSed. 1. Self-evidently wonderful to anyone in a poSition to notice: "The Trailblazer' S 19.2 KbaudPEP mode with on-the-flyLempel-Ziv compreSSion iS a Good Thing for SiteS relaying netnewS". 2. Something that can' t poSSibly have any ill Side-effectS and may Save conSiderable grief later: "Removing the Self-modifying code from that Shared library would be a Good Thing". 3. When Said of Software toolS or librarieS, aS in "Yacc iS a Good Thing", Specifically connoteS that the thing haS draStically reduced a programmer' S work load. OppoSite: Bad Thing, compare big win. [Jargon File] (1995-05-07)