CATIA is a 3d-solid modelling software system, extremely powerful. It was developed and marketed by IBM, but then sold to Dassault, who builds the Mirage fighter. Dassault has been acquiring lots of powerful software for industry.
You've got it backwards, bud. Dassault developed it long before IBM started marketing it. Dassault used it back when machines were tape readers, or merely NC machines - not even CNCs yet.
Boeing decided to use it, but needed someone to service the contract. Enter IBM.
Dassault developed it....IBM marketed it....hell of a package.,..