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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| NK2 - Extension Details | |||||
| Date Added: | January 01, 1970 | ||||
| File Extension: | .NK2 | ||||
| Description 1: | NK2 identifies the AutoComplete file in Outlook. Such files belong to Microsoft's email client Outlook, serving up autocomplete functionalities for the input fields within the application. This oftenhidden data file contains data required by Outlook to automatically fill in info for users. Using the .NK2 extension, the utility is able to read Outlook's AutoComplete file and display entire email records kept in it, allowing users to easily retrieve or export the records into text/HTML/XML files. | ||||
| File Type: | Outlook AutoComplete File | ||||
| Mode: | |||||
| Program(s) to Open: | Microsoft Outlook | ||||
| Common: | |||||
| Extension: | |||||
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