7 7 7 7 ▁( Oct al ) ▁were ▁on ▁the ▁drum . ▁ ▁F ixed - point ▁numbers ▁had ▁a ▁ 1 - bit ▁sign ▁and ▁a ▁ 3 5 - bit ▁value , ▁with ▁negative ▁values ▁represented ▁in ▁ones ' ▁complement ▁format . ▁ ▁Inst ru ctions ▁had ▁a ▁ 6 - bit ▁operation ▁code ▁and ▁two ▁ 1 5 - bit ▁oper and ▁addresses . ▁ ▁Program ming ▁systems ▁for ▁the ▁machine ▁included ▁the ▁RE CO ▁regional ▁coding ▁assemb ler ▁by ▁Rem ington - R and , ▁the ▁RA W O OP ▁one - pass ▁assemb ler ▁and ▁SN AP ▁floating ▁point ▁interpret ive ▁system ▁author ed ▁by ▁the ▁Ram o - W o old ridge ▁Corporation ▁of ▁Los ▁Angeles , ▁the ▁F LI P ▁floating ▁point ▁interpret ive ▁system ▁by ▁Cons olid ated ▁V ul te e ▁A ircraft ▁of ▁San ▁Diego , ▁and ▁the ▁CH IP ▁floating ▁point ▁interpret ive ▁system ▁by ▁Wright ▁Field ▁in ▁Ohio . ▁ ▁UN IV AC ▁ 1 1 0 3 / A ▁we ighed ▁about ▁. ▁▁ 1 1 0 3 A ▁The ▁UN IV AC ▁ 1 1 0 3 A ▁or ▁Un iv ac ▁Scient ific ▁was ▁an ▁upgrad ed ▁version ▁introduced ▁in ▁March ▁ 1 9 5 6 . ▁ ▁Sign ific ant ▁new ▁features ▁on ▁the ▁ 1 1 0 3 A ▁were ▁its ▁magnetic - core ▁memory ▁and ▁the ▁addition ▁of ▁interrupt s ▁to ▁the ▁processor . ▁The ▁UN IV AC ▁ 1 1 0 3 A