▁the ▁Apple ▁iOS , ▁a ▁bar code ▁reader ▁is ▁n atively ▁supported ▁within ▁the ▁camera ▁app . ▁With ▁Black Ber ry ▁devices , ▁the ▁App ▁World ▁application ▁can ▁n atively ▁scan ▁bar codes . ▁Windows ▁Phone ▁ 8 ▁is ▁able ▁to ▁scan ▁bar codes ▁through ▁the ▁B ing ▁search ▁app . ▁ ▁H ous ing ▁▁ ▁Bar code ▁readers ▁can ▁be ▁distinguished ▁based ▁on ▁housing ▁design ▁as ▁follows : ▁ ▁Hand h eld ▁sc anner ▁with ▁a ▁handle ▁and ▁typically ▁a ▁trigger ▁button ▁for ▁switching ▁on ▁the ▁light ▁ ▁like ▁this ▁are ▁used ▁in ▁factory ▁and ▁farm ▁autom ation ▁for ▁quality ▁management ▁and ▁sh ipping . ▁P DA ▁sc anner ▁( or ▁Auto - ID ▁P DA ) ▁a ▁P DA ▁with ▁a ▁built - in ▁bar code ▁reader ▁or ▁attached ▁bar code ▁sc anner . ▁Autom atic ▁reader ▁a ▁back ▁office ▁equipment ▁to ▁read ▁bar coded ▁documents ▁at ▁high ▁speed ▁( 5 0 , 0 0 0 / hour ). ▁Cord less ▁sc anner ▁( or ▁W ire less ▁sc anner ) ▁a ▁cord less ▁bar code ▁sc anner ▁is ▁operated ▁by ▁a ▁battery ▁fit ▁inside ▁it ▁and ▁is ▁not ▁connected ▁to ▁the ▁electric ity ▁main s ▁and ▁transfer ▁data ▁to ▁the ▁connected ▁device ▁like ▁PC . ▁ ▁Method s ▁of ▁connection ▁ ▁Early ▁serial ▁interfaces ▁ ▁Early ▁bar code ▁sc ann ers , ▁of ▁all ▁formats , ▁almost ▁univers ally ▁used ▁the ▁then - common ▁R S - 2 3 2 ▁serial ▁interface . ▁This ▁was ▁an ▁elect r ically ▁simple