Add Yahoo as a preferred source to see more of our stories on Google. Tyler Lizenby/CNET If you want to keep an eye on how much energy your household uses and how you can reduce some of your monthly ...

The way a typical computer monitor works is simple. You connect to a PC or laptop, and it acts as a display for your computer. You can even use multiple monitors together to improve productivity.

Alan Bradley is an experienced commerce, tech and culture writer with more than 20 years covering consumer electronics, popular and emerging technology, and small business solutions. He has served as ...