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File Compression
Quick revise
File compression software can be used to make files smaller so that more data can be stored in the same amount of space on backing store.
When a compressed file on backing store needs to be used it must be decompressed.
This can be done using decompression software or by setting files up to be self-extracting which means that they can automatically decompress themselves.
Winzip is an example of software that can be used to compress and decompress files.
