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    ZIP file, being an archive with one or more compressed files, lets you store files together or separately. Each file can be compressed using different compression techniques like Deflate, BZIP2, Implode, Store, Shrink, LZMA, WavPack, or PPMd. An insight into its file format specifications: https://wiki.fileformat.com/specification/compression/zip/ let you know how the ZIP bombs may have been achieved.