Xero can refer to: · Xero , an online accounting system designed specifically for small and medium businesses · Xero , an Australian punk rock band from the late 1970s and early 1980s · Xero , an American rock band, who eventually became Linkin Park · Xero , a science fiction fanzine that won a Hugo award in 1963 · Xero , a superhero comic book published by DC Comics · A character from The Atrocity Exhibition by J. G. Ballard · A Greek word meaning "I know" (Gk. ????) http://www.kypros.org/cgi-bin/lexicon (enter "xero" in Greek-English pane) · A prefix meaning "dry" (from Gk. ?????) http://www.kypros.org/cgi-bin/lexicon (enter "xiros" in Greek-English pane)