There are many differences between these three files. The common link the three files have are that the are all used to compress information/files. The 7z zip file is a compressed file that is in an archive format. It supports several different data compressions and encryption’s. It has high compression ratios and has large file support. The Bzip file is the only file between the three files that is not an achiever file. The Bzip file is a loss-less source of data compression. The Bzip file is slower at compressing than the 7z file. Like the 7z file the Zip file is a data compressor and is in the archive format. The zip files contain one or more files that have been compressed or reduced in size. The zip file is the more dominant format of the three.