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A zip file is a compressed file (or group of files) with the file subscript .zip. The compression technology is widely used and evaluation and 'shareware' programmes exist, such as Winzip and WinRAR, to 'decompress' the file once it is received. The decompression programmes, sometimes called 'archivers', guide you through the process, which they call 'extraction'. They ask you to select which files you would like extracted and to nominate a destination folder for the extracted files. Once the process has been carried out, you can print, display or exectute the files as normal. Sometimes a compressed file or folder has an inbuilt executable programme, which allows you to double-click the file name and extraction is then carried out automatically. Downloads using this technique have a .exe. subscript.
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