Did You Know?
Some CDs can hold up to 80 minutes of music!
How CDs Work
CDs have tiny bumps that hold sound.
Different Types of CDs
Some CDs play music, some store data.
What cd Does
CDs play music and sounds.
They can hold games and files.
You need a player to use them.
They are round and shiny.
CDs can last a long time.
Many people still use CDs today.
More About cd
The CD was made in the 1980s. It was new and cool then. Many people liked to buy them. They were a great way to listen to music.
Now, we can find music in many ways. But some people still love their CDs. They like to hold them and play them.
In the future, we might have new ways to listen. But CDs will always be a part of music history!
How Topics Connect
graph TD
A["Compact Disc (CD)"] --> B["Co-developed by Philips and Sony"]
A --> C["First released in Japan (October 1982)"]
A --> D["Employs CD-DA standard"]
A --> E["Holds uncompressed stereo audio"]
A --> F["Adapted for computer data storage (CD-ROM)"]
A --> G["Expanded into writable and multimedia formats"]
A --> H["Over 200 billion CDs sold (as of 2007"]
What Do These Words Mean?
compact disc:a small round disc used to store music or data
digital optical disc:a type of disc that uses light to read and store digital information
uncompressed stereo audio:sound that is stored without losing any quality and has two channels for left and right speakers
optical disc format:a way of organizing data on a disc that can be read by a laser
writable format:a type of disc that can be recorded on multiple times
