


You can identify an Adobe Acrobat file by the. zip (Note: a file extension is a series of characters that follow a period (or dot) in a file name.)Īdobe Reader, a free program for Windows and Mac, allows you to view a Portable Document Format (PDF) file with the exact layout intended by the author. A popular compression format is ZIP, identified by the file extension.

To decompress the file, you usually need a decompression tool of the same format to expand the files and make them usable again. Archiving utilities such as WinZip for Windows and StuffIt Expander for Macintosh/Windows decompress these kinds of files. Often files are compressed to make them smaller for uploading, downloading and saving on disk.
