Data compression

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Data compression is making data use less space on a disk. When we compress data, we make it smaller. Some reasons why data is compressed are: to make them download faster, to make them fit on floppy disks, and to make them easier to archive (keep). To make pictures and movies smaller, we often remove parts that the human eye cannot see. This is known as "lossy" compression and it is effective because of human limitations.

There are many different ways to compress data. The most common way is known as "zipping" data. You can also "unzip" data to use it again.

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