A group of sectors on a disk. A sector is a small piece that can be accessed on your memory hard disk in the same way a cluster is a vaguely larger unit that is used to arrange and recognize files on the disk. Most files acquire up several clusters of disk space.

Each cluster has a exclusive ID, which enables the hard drive to position all the clusters on the disk. The computer clustering approach usually (but not always) connects a number of readily available computing nodes (e.g. personal computers used as servers) via a fast local area network.

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Alexander Graham Bell (March 3, 1847 – August 2, 1922) was a Scottish-born scientist, inventor, engineer, and innovator who is credited with patenting the first practical telephone.