Computer files that have been reduced in size by a compression program. Such programs are available for all computer systems. For instance, PKZIP in DOS, tar and compress in UNIX, and Stuffit for the Macintosh.
Large files that have been reduced in capacity in order to allow them to be downloaded over the internet more speedily, either using FTP or a web browser, and which require decompression software in order to be used. Unzip is one such programme for the Mac and Winzip does the trick for the PC.
Compressing a file stores the data in a format that requires less space without erasing the information. This speeds communications because smaller files can be transmitted more quickly. For example due to their large size, graphic files are commonly compressed. Examples of compressed graphic files include JPEG and GIF. Although they retain all the original information, when compressed, graphics files can suffer a reduction of quality.
Files that have been squeezed by a special compression program so that they take up less space than the original. Most compression algorithms look for repeated patterns in the data file and replace the pattern with a much shorter key. One of the most popular compression programs around is PKzip.
Files which have been made smaller so that they can travel faster across a network. Programs, such as Winzip and Stuff-it, are able to compress and decompress the files after they are transferred.
Files that have been written in a format that takes up less space. Standard on a PC is Zip, standard on a Mac is Stuffit. Gif and JPG are compressed graphics file formats.
are those that have been put through a process to reduce their size. Image files such as GIF, PNG and JPEG are compressed before they are sent on the Internet to save download time.
An option in some McAfee® products that scans for files that have been packed. See packed executable