I have microsoft outlook2000 installed on and partials of my contact list on 2 different operating system platforms (windows ME & Windows2000Perofessional) on one computer, and also on another computer operating on NT. All were installed from the same version/copy of outlook2000. How can I merge all of my contact lists in one master list? What is the file format extension of the contacts file? If I can’t merge the lists, can i move all of the contact file folders on to one access platform on one system and switch between them? Thanks!