In stereophonic sound, sound is recorded on two different channels and then mixed or blended back together, for an observable effect in playback. This is in contrast to monophonic sound, which involves only one channel. Stereophonic sound is also known as stereo sound or stereo.
Removable media are data storage devices capable of computer system removal without powering off the system. Removable media devices are used for backup, storage or transportation of data.
Examples of removable media include Universal Serial Bus (USB) drives, CDs, DVDs, diskettes and Blu-ray Disc. In addition to portability advantages, removable media are capable of fast data backup and recovery, which are essential corporate requirements. One disadvantage is that removable media are more expensive than data tape.
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