There are two kinds of of HD DVD discs for content, 15GB single layer disc and dual-layer disc with double capacity, a full 30GB. Using latest compression technologies, 30Bg disc can store up to 7 hours of images. Today' DVD has a capacity of 4.7GB and store only 2 hours of standard definition content.

HD DVD discs have a data transfer rate of 36.55Mbps which allows 24Mbps data stream of digital television broadcasts to be seamlessly recorded.

Using HD DVD in every day world will have numerous advantage over other optical media technologies. The resilient HD DVD disc has a protective layer which removes need for a protective cartridge, allowing development of slim computer drives. The added bulk of a disc cartridge would have also caused any laptops using a cartridge based optical media disc to increase substantially in size to allow for extra room drive would need.

4. Don’t be afraid to buy anti-virus software. If you have to download files from internet as part of a job or hobby, then it is probably a good idea to have some sort of anti-virus software on your Macintosh. Apple provides a wide-variety of anti-virus software that is constantly updated.

5. Finally, keep an eye on those e-mail attachments and instant messages. Some hackers have programmed viruses to IM you from one of your friends’ screen names. Don’t click on any link without knowing what it is first. Most e-mail providers use virus scans automatically, but you should always be extra careful when downloading an attachment. If it is from someone you do not know, don’t trust it.

Apple computers are very safe from hackers, but they can always be improved. Keeping a computer safe, and running well requires a great amount of time and energy. Just remember that if your computer is safe, your Apple experience will be much more rewarding.