Windos server OS

Sun Microsystems Inc. will start selling its lineup of 64-bit PC servers preinstalled with the Windows Server operating system from Microsoft Corp. within 90 days, the two companies said today.
The two longtime rivals also said they will cooperate on technical development of Microsoft's server operating system on Sun Fire hardware, as well as making Sun's Solaris Unix operating system fully manageable under Microsoft's recently introduced System Center Virtual Machine Manager software.