Ancor IT director Kelly Colohan had a decision to make. Informed by IBM that it would no longer support MVS 2.10, the operating system he was running on his mainframe, Colohan had two choices. He could either stick with Big Blue by buying a new mainframe, or bump his ancillary servers up to the varsity and migrate. So Colohan took the 24 servers he already had, added six more and <A HREF="http://search390.techtarget.com/originalContent/0,289142,sid10_gci1065645,00.html">left IBM and its 2003-205 mainframe behind.</A> The revamped network will run on Windows Server 2003 and Windows Server 2000 operating systems.