' s ▁road map , ▁was ▁sold ▁through ▁December ▁ 2 0 0 9 , ▁with ▁continued ▁support ▁for ▁v 1 ▁at ▁least ▁until ▁December ▁ 2 0 1 5 . ▁ ▁See ▁also ▁ ▁H P ▁Roman - 8 ▁( character ▁set ) ▁ ▁References ▁▁ ▁Scott ▁W . ▁Y . ▁Wang ▁and ▁Jeff ▁B . ▁Lind berg ▁" HP - U X : ▁Im plementation ▁of ▁UN IX ▁on ▁the ▁H P ▁ 9 0 0 0 ▁Series ▁ 5 0 0 ▁Computer ▁Systems ", ▁H ew lett - Pack ard ▁Journal ▁( volume ▁ 3 5 ▁number ▁ 3 , ▁March ▁ 1 9 8 4 ) ▁ ▁Frank ▁Mc Con nell , ▁More ▁about ▁the ▁H P ▁ 9 0 0 0 ' ', ▁g aby . de ▁ ▁H ew lett - Pack ard ▁Company , ▁" HP - U X ▁Reference , ▁Vol . ▁ 1 , ▁H P - U X ▁Release ▁ 6 . 5 , ▁December ▁ 1 9 8 8 ", ▁H P ▁Part ▁number ▁ 0 9 0 0 0 - 9 0 0 0 9 ▁ ▁External ▁links ▁H P - U X ▁Home ▁H P - U X ▁Software ▁& ▁Update ▁Information ▁H P - U X ▁Public ▁Road map ( PDF ) ▁H P - U X ▁Up dates ▁Release ▁Notes ( PDF ) ▁H P - J ournal ▁oct . ▁ 1 9 8 5 ▁introdu cing ▁the ▁H P ▁Integr al ▁and ▁H P - U X