File Extension PUB
The PUB file extension is associated with the Microsoft Office Publisher application from Microsoft. The Microsoft Office Publisher application helps users create, share and personalize different kinds of publications as well as marketing materials. Examples of publications that can be created with this application are for instance, postcards including marketing materials like newsletters, brochures, flyers and so on. One can use the program to create e-mail and website formats as well.

File extension PUB is categorized in the Data Files category. This file format is specified as a Graphic File Type. Additionally, this file format also bears the mime type, application/x-mspublisher. Users looking to open files bearing this file format are required to have certain applications installed on the system. This is also dependant on the operating system that one is using.
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Thus, on the Mac OS, one is required to have the Adobe InDesign application installed. This is because this application comes with the PUB2ID Plug-in, which is required to access the PUB file extension. Other programs that could help one open a file bearing the PUB file format on the Windows operating system are Microsoft Publisher and the Windows version of Adobe Indesign. The file extension PUB, also references files for the NeoBook NBW Publication application, which was created by the NeoSoft Corp.

This application allows users to creatively combine sound, text and graphic animation together with other elements to make interactive, multimedia programs. Some of these programs include presentations, brochures, educational materials and greeting cards, computer-based applications that can be used for training, CD interfaces and electronic books. Other programs that use file extension PUB are Public Key Ring from the PGP Corporation, Pretty Good Privacy (PGP) and Print Perfect Gold Template.
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The Sims Family Data created by Electronic Arts (Maxis) and Ventura Publisher created by the Corel Corporation. Since this file format is associated with numerous applications, it is vitally important for users looking to use this file to appropriately associate it with the correct associated application. This is because is inappropriately associated, one is bound to experience inappropriate association errors. Additionally, if one finds that they are unable to access PUB file extension on a Windows platform, it could be due to the occurrence of registry errors.