This article comments on the trend in personal computing as of June 2005. When Tracey Capen, this magazine's editor for reviews, went hunting for a new cmputer for his home network, he knew what he wanted: an affordable, secure, compact machine with enough hardware muscle and software savvy for demanding jobs like video editing. He found all of the above in a Mac Mini. And while some people might consider a Macintosh a counterintuitive choice for "PC World" reviews guy, the most startling thing about Tracey's decision was that it was not all that startling. Nor was I dumbstruck to learn that "PC World" Web producer David Lake's home office includes a Windows PC, a Linux system, and a machine that dual-boots between the two operating systems. Time was when it seemed like everything from file formats to user interfaces consipired to discourage folks from adopting more than one computing platform. But lately we are hearing from more and more readers who lead happy, productive multiplatform lives. Herewith, a few tips from Tracey and David on doing just that. Buy a KVM switch: Starting at around $50, these gizmos let you use one keyboard, display, and mouse combination with two or more personal computers. KVMs are invaluable, especially in crowded quarters. However, configuring them can be tricky, warns Tracey, who uses one with his Mini and with a Windows system. Try multimachine multitasking: Even a poten personal computer may sputter if you throw too many jobs at it at once. So Tracey often starts the Mini going on a single grueling task, and then switches to his Windows box for word processing, e-mail and other less demanding work.