What is the full form of a CD?
The full form of CD is the compact disc. It is a flat, tiny-rounded storage unit that can store up to 700 MB of information and is 4.75 inches in diameter. It is compact, so it is possible to carry it wherever. Because its consistency does not degrade with time & long duration, we could operate it countless times. 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 recording sound & storing it.
- A CD was later allowed to store collections of information on its disc as technology advanced. The compact disc was then named CD-ROM(Compact Disk-Read Only Memory).
- The information stored only has the read operation, not the writing process. Sony company made the very first CD audio player to the public in Japan.
Characteristics of CD
A CD’s characteristics involve the following:
- A regular Compact Disc has a diameter of around 120 millimetres (mm) and a width of 1.2 millimetres (mm).
- It consists entirely of plastic and has a shiny, glossy appearance.
- It just weighs up to 15 or 20 grams.
- A CD’s storage space is up to 700 MiB, which ensures that a Compact Disc can operate for 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 reflects various colours as light strikes it. 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 repeatedly.
- The Video Compact Disc(VCD) helps you to see a moving picture on the screen quickly.
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.