What is the full form of CD?
The full form of CD is the compact disc. It is a flat, tiny-rounded storage unit that can store information of up to 700 mb and 4.75 inches in diameter. It is compact, so it is possible to carry wherever. Because its consistency does not degrade with time & long duration, we could operate it countless time. CDs can store digital formats of any information, such as video, audio, text, photographs, and so on. The data is stored on the disc in the form of tiny notches, and when the disc is performed, the information is interpreted from an optical drive by a laser.
A brief history of CD
- It was first produced by two firms, Sony & Philips, respectively. Initially, the CD was created only for Initially, and the CD was made only for recording sound & storing.
- A CD was later allowed to store collections of information on its disc as technology advanced. The compact disc then named as CD-ROM(Compact Disk-Read Only Memory).
- The information stored only has the read operation but not the writing process. The very first CD audio player was made available to the public in Japan by Sony company.
Characteristics of CD
A CD’s characteristics involve:
- A regular Compact Disc has a diameter of around 120 millimeters (mm) and a width of 1.2 millimeters (mm).
- It consists entirely of plastic and has a shiny, glossy appearance.
- It just weighs up to 15 or 20 gram.
- A CD’s storage space is up to 700 MiB, that ensures that a Compact Disc can operate up to 80 minutes of sound quality.
Types of compact discs
- The Compact Disc-Read Only Memory (CD-ROM) is a common and standard optical disc used during computer data processing.
- Recordable Compact Disc (CD-R) has a write process option. It is made of quality dye that, as light strikes on it, reflects various colours. The CD-R has a life span of 20 to 100 years.
- The ReWritable Compact Disc (RW-CD) is a disc where material can be removed and rewritten over and over again.
- The Video Compact Disc(VCD) helps you to see a moving picture on the screen easily.
Benefits of CD
- In terms of size, it is tiny.
- It is a portable device.
- Access to Data Faster.
- It is inexpensive to manufacture.
Limitation of CD
- It has a smaller storage capacity.
- It can create scratches when it is used quite frequently.