Samba is an Open Source/Free Software suite that provides seamless file and print services to SMB/CIFS clients including Windows machines. Samba can be installed on Linux and Unix servers and provides interoperability with Windows desktops and Windows file servers. The 2004 IDC server report listed Unix and Linux server sales at 1.48 million servers worldwide or 28.3% of server sales. IDC projects the 2008 Unix and Linux market share at 3.5 millions servers sold or 37.6% of the market.
Link: Market Wire