▁small ▁sort ▁section ▁of ▁the ▁building . ▁The ▁packages ▁are ▁then ▁read ▁in ▁a ▁tunnel ▁by ▁ 1 6 ▁sc ann ers ▁and ▁a ▁camera , ▁which ▁signals ▁a ▁series ▁of ▁p add les ▁to ▁di vert ▁the ▁packages ▁onto ▁other ▁convey or ▁bel ts . ▁When ▁a ▁box ▁is ▁sc anned , ▁the ▁box ▁is ▁di vert ed ▁to ▁the ▁small ▁sort ▁on ▁the ▁me zz an ine , ▁or ▁second ▁level ▁of ▁the ▁building . ▁Items ▁that ▁are ▁not ▁di vert ed ▁go ▁onto ▁convey or ▁bel ts ▁or ▁the ▁DA ▁( Data ▁Ac quisition ), ▁which ▁rel abel s ▁packages . ▁Open ▁packages ▁are ▁un loaded ▁from ▁the ▁primary ▁section ▁and ▁put ▁on ▁one ▁of ▁two ▁convey or ▁bel ts ▁to ▁be ▁sorted . ▁ ▁Small ▁package ▁sort ▁ ▁The ▁small ▁package ▁sort ▁is ▁located ▁at ▁C AC H , ▁and ▁oper ates ▁by ▁un loading ▁incoming ▁packages ▁and ▁distrib uting ▁them ▁into ▁other ▁b ags . ▁Small ▁packages ▁are ▁bag ged ▁at ▁the ▁east / west ▁boundary ▁and ▁a ▁series ▁of ▁convey or ▁bel ts , ▁called ▁b ull f ro gs ▁on ▁the ▁me zz an ine . ▁All ▁small ▁packages ▁are ▁sent ▁to ▁a ▁series ▁of ▁sorting ▁machines . ▁The ▁small ▁package ▁sort ▁contains ▁ 1 4 ▁sorting ▁machines , ▁including ▁primary ▁and ▁secondary ▁levels ▁of ▁sorting ▁machines . ▁Small ▁packages ▁are ▁organized ▁and ▁sent ▁to ▁induct ors ▁to ▁place ▁small ▁packages ▁on ▁a ▁convey or ▁of ▁machines . ▁The ▁small ▁packages ▁are ▁read ▁in ▁a ▁tunnel