Waa maxay PIN?
Lambarka aqoonsiga shakhsi ahaaneed (PIN), ama mararka qaarkood lambarka PIN ama lambarka PIN, waa lambarka lambarka (mararka qaarkood alfa-lambarka) lambarka sirta ah ee loo adeegsado habka aqoonsiga isticmaalaha gala nidaamka.  PIN-ku wuxuu fududeeyay xogta gaarka loo leeyahay ee u dhaxaysa xarumaha kala duwan ee xogta ee shabakadaha kombiyuutarka ee hay'adaha maaliyadeed, dawladaha, iyo shirkadaha. PIN-yada waxaa loo isticmaali karaa in lagu xaqiijiyo nidaamyada bangiyada ee haysta kaararka, dowladaha muwaadiniinta, shirkadaha shaqaalaha, iyo kombiyuutarada isticmaalayaasha, iyo adeegyo kale.  Sida caadiga ah, PIN-yada waxaa loo isticmaalaa ATM ama POS macaamil ganacsi, koontaroolka marin-u-helka amaanka ah (tusaale ahaan marin-u-helka kombiyuutarka, marin-u-helka albaabka, marin-u-helka baabuurka), macaamil ganacsi internetka, ama in lagu galo bog internet oo xaddidan.