Although still not as widespread, it is no longer uncommon for computer users to face more than one screen at a time, whether in a more permanent multi-monitor setup or in an ad hoc presentation.

So you want to use a monitor as a second screen for your Windows tablet. No problem, just plug the monitor into an HDMI or USB port on your mobile device and your screen will be mirrored. Want to use ...

Dan Ackerman leads CNET's coverage of computers and gaming hardware. A New York native and former radio DJ, he's also a regular TV talking head and the author of "The Tetris Effect" ...

Every modern laptop has a smooth square beneath the keyboard designed to help you navigate without a mouse. On a MacBook, it's called a trackpad; on a Windows PC, it's called a touchpad. But ...