The software deployment market grew 4.4% last year, to just over $7 bln, and will continue to grow at a similar clip through 2008, IDC said. IBM, BEA and Oracle retained their top rankings from 2002, with market shares of 35.6%, 11.5% and 5.9%, respectively. But the mainframe and OS/400 systems that have given IBM its commanding lead will be displaced gradually, mostly by Unix, Linux and Windows systems.