pl. n. A hackish (and especially MIT) tradition is to choose acronyms that refer humorously to themselves or to other acronyms. The classic examples were two MIT editors called EINE ("EINE Is Not EMACS") and ZWEI ("ZWEI Was EINE Initially"). More recently, there is a Scheme compiler called LIAR (Liar Imitates Apply Recursively), and GNU (q.v., sense 1) stands for "GNU's Not UNIX!" -- and a company with the name CYGNUS, which expands to "Cygnus, Your GNU Support".