What is a file extension?Short answer: it's the set of letters after the period (.) in the name of a file. Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems. In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file. Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse! |
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| ABCDEFGHIJKLMNOPQRSTUVWXYZ | |||||
| P7S - Extension Details | |||||
| Date Added: | December 10, 2008 | ||||
| File Extension: | .P7S | ||||
| Description 1: | A file with the .P7S extension attached is associated with email messages that feature a digital signature. Use this Digitally Signed Message filetype to send secure emails that only their intended recipients can view. This file format is able to verify that the emails are from who they say they are from or claim to be from. It also checks that the emails have not been altered or modified in any way while in transit. | ||||
| File Type: | Text file | ||||
| Mode: | ASCII | ||||
| Program(s) to Open: | Windows: Microsoft Outlook Macintosh: MacOS X Mail | ||||
| Common: | |||||
| Extension: | |||||
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