▁stations ▁in ▁South ▁Korea ▁Category : Transport ▁in ▁Se oul <0x0A> </s> ▁Warren ▁Te itel man ▁( 1 9 4 1 ▁– ▁August ▁ 1 2 , ▁ 2 0 1 3 ) ▁was ▁an ▁American ▁computer ▁scient ist ▁known ▁for ▁his ▁work ▁on ▁programming ▁environments ▁and ▁the ▁in vention ▁and ▁first ▁implementation ▁of ▁concepts ▁including ▁Und o ▁/ ▁Red o , ▁sp elling ▁correction , ▁advis ing , ▁online ▁help , ▁and ▁D W IM ▁( Do ▁What ▁I ▁Mean ). ▁ ▁Early ▁career ▁and ▁AR P AN ET ▁Warren ▁Te itel man ▁presented ▁a ▁novel ▁scheme ▁for ▁real ▁time ▁character ▁recognition ▁in ▁his ▁master ' s ▁th esis ▁submitted ▁in ▁ 1 9 6 6 ▁at ▁M IT . ▁A ▁rectangle , ▁in ▁which ▁a ▁character ▁is ▁to ▁be ▁drawn , ▁is ▁divided ▁into ▁two ▁parts , ▁one ▁sh aded ▁and ▁the ▁other ▁un sh aded . ▁Using ▁this ▁division ▁a ▁computer ▁converts ▁characters ▁into ▁t ern ary ▁vectors ▁( a ▁list ▁composed ▁of ▁ 3 ▁values : ▁ 0 , ▁ 1 , ▁or   − ) ▁in ▁the ▁following ▁way . ▁If ▁a ▁pen ▁enters ▁the ▁sh aded ▁region , ▁a ▁ 1 ▁is ▁added ▁to ▁the ▁vector . ▁When ▁the ▁un sh aded ▁region ▁is ▁entered , ▁a ▁ 0 ▁is ▁app ended . ▁The ▁th esis ▁continued ▁to ▁be ▁c ited ▁for ▁several ▁dec ades ▁after ▁its ▁submission . ▁ ▁He ▁started ▁as ▁AR PA ▁Princi pal ▁Investig ator ▁from ▁ 1 9 6 8 ▁to ▁