Every time my cat Mira walks across a keyboard, I learn a few new Mac and PC keyboard shortcuts I never knew about.

I tested all the major webcams across the price spectrum in attempts to find the very best. Here's what I learned.

For Android devices, you can take a screenshot by pressing the Power and Volume Down buttons at the same time. Another option is to hold the Power button for two seconds, then select Screenshot.

Gunk happens! Here's how to clean up your laptop's act—from the top bezel to the bottom fan—without inflicting harm. (It's easy, and you can use products you have around the house.) Computers are my ...