Home audio and video systems have changed dramatically from their earliest incarnations. Television began as a mechanical device but didn't really catch on until electronic TVs began to hit the market and more broadcasters began signing on.

It grew more popular as it changed from tiny black-and-white screens to large color sets. And now you can buy TVs that can take up the whole wall of your living room! In February 2009, television stations in the United States will switch from analog to digital signals, encouraging people to buy converter boxes or make the move and upgrade, which means plunking down big money for new high-definition sets.

Televison may be the cornerstone of home audio and video setups, but most people need more than just a good TV. We started recording TV shows on videocassette recorders, but fewer people use them anymore. They're all switching to digital video recorders, DVDs and Blu-ray discs. And then there's those sophisticated component sound systems and surround sound systems that add so much character and depth to our television and movie watching.

No doubt, home audio and video equipment is very popular, but deciding on the best equipment can be a challenge. Each person has his or her own preferences that lead to very different choices. We have a whole library of home audio and video articles that will help you learn more about different technologies. Find out what's inside a remote control. Learn the differences between plasma and LCD televisions. See how speakers work. Find out how to bend your TV schedule to suit your viewing habits, with Internet TV, the TiVo and the Slingbox. We'll even sneak a peek at the next wave of technologies, such as ultra-high definition TV. Explore our Home Audio and Video articles to find out more.