Letter To Linux Customers SCOsource -------------------------------------------------------------------------------- May 12, 2003 Dear commercial Linux user: SCO holds the rights to the UNIX operating system software originally licensed by AT&T to approximately 6,000 companies and institutions worldwide (the “UNIX Licenses”). The vast majority of UNIX software used in enterprise applications today is a derivative work of the software originally distributed under our UNIX Licenses. Like you, we have an obligation to our shareholders to protect our intellectual property and other valuable rights. In recent years, a UNIX-like operating system has emerged and has been distributed in the enterprise marketplace by various software vendors....