The old order changeth with a vengeance: at the heart of Eastman Kodak Co’s Photo CD system for transferring snapshots to a compact disk, and at the heart of Xerox Corp’s new DocuSP printing-on-demand system is a Unix server from Sun Microsystems Inc, but it’s not too long ago that such not very visible but vitally revenue-generating computers would have been PDP-11s from Digital Equipment Corp…