According to IDC, the worldwide storage software market grew 15% YTY to $2.2 bln in Q4 2004. For the full year 2004, storage software revenue grew 16.1% YTY to $7.9 bln. EMC (with Legato) led the overall market in Q4 2004 with 31.7% revenue share, gaining the greatest YTY market share among the top 5 vendors. Veritas maintained its second position with 21.7% revenue share, growing 11.4% YTY. Computer Associates and IBM finished in a statistical tie for the third position, with 8.8% and 8.2% revenue share, respectively. HP rounded out the top 5 with 6.6% revenue share. EMC and IBM posted the strongest quarterly results among the top 5 vendors, with 25.1% and 16.7% YTY growth, respectively. For the full year 2004, EMC led the overall market with 30.9% revenue share, followed by VERITAS with 21.9% revenue share.