The .pub file extension is given to Publisher documents. This file format is used by the Microsoft Publisher software application, which is part of the Microsoft Office Professional Suite. The Publisher software is used to create business documents and marketing materials such as posters, flyers, newsletters, banners and other creative publishing files.
PUB files can contain both raster and vector graphics, text and drawn objects. They are also sometimes used to integrate data for mail merges. In addition to creating files for print documents, Publisher can also be used to create documents for email campaigns and for use on the Internet.
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