1. DVDs what they are and how they work

2. DVDs DVD originally stood for: D V D igital isc ideoVersatile? http://en.wikipedia.org/wiki/DVD

3. What is a DVD? A DVD is a new data storage standard, just like a VHS video tape is a storage standard A single layer DVD stores about seven times more information than a CD. This is enough data to hold up to 133 minutes of high resolution video

4. How does a DVD work? Data is recorded onto the DVD surface as a long spiral. 0s and 1s are stored on the surface using a laser which makes ‘bumps’ on the surface Pictures from http://www.howstuffworks.com

5. How does a DVD work? Laser Optical Pickup Data goes to computer Pictures from http://www.howstuffworks.com

6. What do they look like? Here is a DVD reader This one is made by LG Picture from http://www.ieci.com.au

7. Bonus Page The latest DVDs can store data on two layers on the DVD This means that the DVD can hold twice as much information