See also: pio, Pio, pío, pió, Pío, pio-, and pi'o English English Wikipedia has an article on:PIOWikipedia Noun PIO (countable and uncountable, plural PIOs) (aviation) Initialism of pilot-induced oscillation. (electronics) Initialism of programmed input/output. (government) Initialism of public information officer. (India, law) Initialism of person of Indian origin. See also (aviation): CFIT Anagrams IOP, IPO, OPI, P.O.I., POI, poiWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads