Exploring Cd Technology: A Comprehensive Guide To Compact Discs And Their Capacity, Types, And Uses

CD

500 – 100 = 400

CD stands for Compact Disc. It is a type of optical storage media used to store digital data such as audio, video, software, and other types of data. A CD is a circular disc with a diameter of 120mm and a thickness of 1.2mm. It is made of polycarbonate plastic and is coated with a reflective metal layer, such as aluminum or silver. The data is stored on the CD as tiny pits and lands engraved onto the reflective layer with a laser beam.

CDs can store up to 700 MB of data, and can have a capacity of up to 80 minutes of audio. They were first introduced in the early 1980s and quickly became a popular method for distributing music, software, and other types of data due to their high storage capacity, cheap price, and compatibility with a wide range of devices.

There are different types of CDs, such as CD-R (recordable) where the data can be written on the disc once, and CD-RW (rewriteable) which can be overwritten multiple times. CDs can be played on standalone CD players, computers, and other devices with a CD drive. They have been largely replaced by digital formats such as MP3 and streaming services, but they are still used for archival purposes, and some music enthusiasts still prefer the sound quality of CDs over digital formats.

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