▁B urr ough s ▁machines , ▁the ▁all ure ▁of ▁IBM ▁was ▁strong , ▁and ▁Excel er ator ▁came ▁to ▁prom in ence . ▁Hot ▁on ▁the ▁he els ▁of ▁Excel er ator ▁were ▁a ▁r ash ▁of ▁offer ings ▁from ▁companies ▁such ▁as ▁Know ledge ware ▁( James ▁Martin , ▁Fran ▁T ark ent on ▁and ▁Don ▁Add ington ), ▁Texas ▁Inst rument ' s ▁CA ▁Gen ▁and ▁Anders en ▁Cons ult ing ' s ▁FO UND ATION ▁tool set ▁( DE SI GN / 1 , ▁IN ST ALL / 1 , ▁F CP ). ▁ ▁CASE ▁tools ▁were ▁at ▁their ▁peak ▁in ▁the ▁early ▁ 1 9 9 0 s . ▁ ▁According ▁to ▁the ▁PC ▁Magazine ▁of ▁January ▁ 1 9 9 0 , ▁over ▁ 1 0 0 ▁companies ▁were ▁offering ▁nearly ▁ 2 0 0 ▁different ▁CASE ▁tools . ▁ ▁At ▁the ▁time ▁IBM ▁had ▁proposed ▁AD / C ycle , ▁which ▁was ▁an ▁al liance ▁of ▁software ▁vend ors ▁centered ▁on ▁IBM ' s ▁Software ▁repository ▁using ▁IBM ▁DB 2 ▁in ▁main frame ▁and ▁OS / 2 : The ▁application ▁development ▁tools ▁can ▁be ▁from ▁several ▁sources : ▁from ▁IBM , ▁from ▁vend ors , ▁and ▁from ▁the ▁customers ▁themselves . ▁IBM ▁has ▁entered ▁into ▁relationships ▁with ▁Bach man ▁Information ▁Systems , ▁Index ▁Technology ▁Corporation , ▁and ▁Know ledge ware ▁where in ▁selected ▁products ▁from ▁these ▁vend ors ▁will ▁be ▁market ed ▁through ▁an ▁IBM ▁complement ary ▁market ing ▁program ▁to ▁provide ▁offer ings ▁that ▁will