CD Full Form?
The full form of CD is Compact Disc.
What is CD (Compact Disc)?
A compact disk is a small rounded, flat, and portable data storage device that allows for storing audio, video, text, and any information in digital form. The capacity of a standard CD is up to 700 MB and the diameter is 4.7 inches. The benefit of a CD is that you can use it for a long time without degrading the quality. Since CD is compact, it is easily portable anywhere.
History of CD (Compact Disc)?
As CD is a combination of various parts and every part has been discovered by different individuals so the credit for inventing the CD can’t be given to a single person. However, most of the credit for the invention of CD goes to American inventor James Russell. Because James Russell envisioned an alternative to vinyl albums for storing and playing audio recordings. James Russell was the first to file a patent in 1966 for a product that resembled a combination of laser, digital recording, and optical disc technology. After that, the patent was sold to Sony and Philips companies in 1980. And the first CD was produced on August 17, 1982, at the Philips factory in Germany.
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Types of CD (Compact Disc).
- (CD-ROM) Compact Disc Read Only Memory entered the market in 1985. A CD-ROM is a common and standard optical disc readable by any computer with a CD-ROM drive. And it follows Yellow Book standards.
- (CD-R) Recordable Compact Disc, which has a write process option. It can be written once and read many times. CD-R is made of a special dye that reflects different colors when light falls on it. (CD-R) follows Orange Book standards.
- (CD-RW) Compact Disc ReWritable. In this disc metallic alloy is used that reflects differently than a regular compact disc. In this disc, data can be erased and rewritten again and again and this Disc follows the Orange Book standard.
- (VCD) Video Compact Disc, which was created in 1993. It followed the White Book standard. Video Compact Disc helps you to see a moving picture clearly on the screen.
Characteristics of CD (Compact Disc)?
- The diameter of a standard compact disc is 120 millimeters.
- The width of the compact disc is 1.2 millimeters.
- A CD offers 650 to 700 MB storage capacity.
- The weight of the compact disc is between 15 grams to 20 grams.
- A CD also offers 74 to 80-minute audio capacity.
- A CD works by focusing a 780-nanometer wavelength semiconductor laser onto a single track of the disc
Advantages and Disadvantages of CD (Compact Disc)
|1. The CD is small in terms of size.|
2. The CD is easily portable
3. The CD is Cheap to produce
4. The CD is not very expensive
|1. The main disadvantage of CDs is their small storage capacity.|
2. CDs may produce scratches after repeated use
3. Slower to access than the Dard Disk.
The future of compact discs
When CDs first hit the market, at that time PCs could store about 10MB of data, that’s the reason so many users started using CDs as storage devices, and the use of CDs gradually increased. Then in 1995 Philips, Panasonic, Toshiba, and Sony introduced DVD as a replacement for CD. DVDs are similar to CDs in terms of dimensions and technology but DVDs offer a higher storage capacity of up to 4.7 GB, which is essentially much better than CDs. The DVD market was also very good for a few years, after that in 2003 Blu-ray was introduced, and blu-ray came into the market as a replacement for DVD.
But now high capacity hard drives, pen drives and online storage are available in the market and due to this the use of CD, DVD, Blu-ray is decreasing day by day.
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Frequently asked questions about Compact Disc
1. What is the full form of CD?
The Full Form of CD is Compact Disc.
2. What is the max storage size of CD?
A standard CD can hold up to 700 MB of digital data.
3. What is the diameter of CD?
The standard CD diameter is 120 mm.
4. How many songs can you put on a CD?
You can store around 80 minutes of music on a standard CD, now coming to the question of how many songs we can hold. Basically, it totally depends on average length of the song. If the length of songs is average 2 to 3 minutes then you can hold approximately 30 songs.
5. What is the lifespan of CD?
Among manufacturers who have tested, there is consensus that, under recommended storage conditions, CD-R (Recordable Compact Disc) should have a life expectancy of 100 to 200 years or more and CD-RW (Compact Disc ReWritable) discs should have a life expectancy of 25 years or more.
6. How many times CD can burn?
The CD-R (Recordable Compact Disc) can only burn once but CD-RW (Compact Disc ReWritable) discs can be erased and burned approximately 1,000 times.