PUB, Microsoft Publisher Document File (.pub)
The PUB Document file format
PUB is the file extension which is generally used by the Microsoft Publisher application which is a part of the Microsoft Office product set. This file format can comprise various objects such as graphics, images, formatted text, or any other kind of object. PUB file types are usually used for amateur publishing while professionals usually choose more high end file types.
Technical details of PUB files
Microsoft Publisher files, or PUB files, may comprise several elements such as graphics, formatted texts, images, or any other object. This file extension has already undergone revisions a number of times, from version 3.0 for Windows 95 to the latest version 14 being used by Microsoft Publisher 2010. Files with the PUB extension lack compatibility which is its major limitation. Programs such as Microsoft Word and many other applications are not compatible with PUB file types.