▁Add itional ▁work , ▁including ▁work ▁on ▁management ▁of ▁parallel ▁tasks , ▁was ▁performed ▁both ▁in ▁the ▁U . S . ▁as ▁S 6 1 . 3 , ▁and ▁in ▁Germany ▁as ▁Pro zess - FOR TRAN . ▁ ▁In ▁ 1 9 8 0 , ▁a ▁joint ▁American / Europe an ▁proposal ▁was ▁published . ▁ ▁While ▁IR TF ▁held ▁some ▁influence ▁in ▁certain ▁mark ets ▁in ▁the ▁ 1 9 7 0 s , ▁by ▁the ▁early ▁ 1 9 8 0 s ▁most ▁process ▁control ▁systems ▁were ▁being ▁built ▁using ▁micro processor - based ▁systems ▁where ▁Fort ran ▁was ▁not ▁available . ▁ ▁Because ▁of ▁this , ▁the ▁IR TF ▁bind ings ▁have ▁fallen ▁into ▁dis use . ▁ ▁Modern ▁systems ▁tend ▁to ▁use ▁P OS IX ▁Thread s ▁instead . ▁ ▁References ▁▁ ▁I SA ▁S 6 1 . 1 ▁( 1 9 7 2 ) ▁Standard . ▁ ▁Indust rial ▁Computer ▁System ▁FOR TRAN ▁Pro ced ures ▁for ▁Executive ▁Function s ▁and ▁Process ▁Input - Output . ▁ ▁Inst rument ▁Society ▁of ▁America , ▁ 1 9 7 2 ▁ ▁I SA ▁S 6 1 . 2 ▁( 1 9 7 3 ) ▁D raft ▁Standard : ▁Indust rial ▁Computer ▁System ▁FOR TRAN ▁Pro ced ures ▁for ▁Hand ling ▁Random ▁Un form atted ▁Files , ▁Bit ▁Man ip ulation , ▁and ▁Date ▁and ▁Time ▁Information . ▁ ▁Inst rument ▁Society ▁of ▁America , ▁ 1 9 7 3 ▁ ▁Indust rial ▁Real - Time ▁FOR TRAN ▁( Intern