▁the ▁idea ▁in ▁the ▁Mult ics ▁operating ▁system . ▁P ou zin ▁returned ▁to ▁his ▁native ▁France ▁in ▁ 1 9 6 5 , ▁and ▁Sch ro eder ▁developed ▁the ▁first ▁Mult ics ▁shell ▁with ▁the ▁assistance ▁of ▁an ▁un named ▁man ▁from ▁General ▁Electric . ▁Sch ro eder ' s ▁Mult ics ▁shell ▁was ▁the ▁prede cess or ▁to ▁the ▁Unix ▁shell , ▁which ▁is ▁still ▁in ▁use ▁today . ▁ ▁Working ▁with ▁Pat ▁Cris man ▁and ▁Louis ▁P ou zin , ▁she ▁also ▁described ▁an ▁early ▁e - mail ▁system ▁called ▁" MA IL " ▁to ▁allow ▁users ▁on ▁the ▁Comp at ible ▁Time - Sh aring ▁System ▁( CT SS ) ▁at ▁M IT ▁to ▁send ▁notifications ▁to ▁others ▁about ▁back ups ▁of ▁files . ▁Each ▁user ' s ▁messages ▁would ▁be ▁added ▁to ▁a ▁local ▁file ▁called ▁" MA IL ▁BO X ", ▁which ▁would ▁have ▁a ▁“ private ” ▁mode ▁so ▁that ▁only ▁the ▁owner ▁could ▁read ▁or ▁delete ▁messages . ▁The ▁proposed ▁uses ▁of ▁the ▁proto - email ▁system ▁were ▁for ▁communication ▁from ▁CT SS ▁to ▁notify ▁users ▁that ▁files ▁had ▁been ▁back ed ▁up , ▁discussion ▁between ▁authors ▁of ▁CT SS ▁commands , ▁and ▁communication ▁from ▁command ▁authors ▁to ▁the ▁CT SS ▁manual ▁editor . ▁The ▁service ▁only ▁made ▁it ▁possible ▁to ▁leave ▁messages ▁for ▁the ▁other ▁users ▁on ▁the ▁same ▁computer . ▁The ▁idea ▁to ▁allow ▁users ▁to ▁send ▁messages ▁between ▁computers ▁was ▁developed ▁later ▁by ▁Ray ▁Tom lin son ▁in ▁ 1 9 7