Screensavers used to be necessary due to CRT monitor quirks -- now they're mostly used for entertainment and security. Find out what a screensaver is and how it knows when to kick in.
Imagine you have a movie marathon weekend -- while you're hooked up to a functional MRI machine. Now imagine that a computer could guess what you were watching after gathering all that MRI data, and you have an idea what some researchers are up to. See more »
There's a special command your computer sends when your keyboard and mice have been idle for a period of time. Find out how your computer activates your screensaver. See more »
Digital images can be saved by numerous methods and in countless file sizes. Learn how the jpg format compresses your photos while maintaining resolution. See more »