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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| XLSM - Extension Details | |||||
| Date Added: | March 03, 2009 | ||||
| File Extension: | .XLSM | ||||
| Description 1: | .XLSM is the file extension linked to Excel 2007 MacroEnabled Spreadsheet. These are spreadsheet workbook files that Microsoft Excel creates. The XLSM files contain embedded macros that are executable within the documents. An .XLSM file is based on the new Open XML file format that the Office 2007 application uses. | ||||
| File Type: | Data file | ||||
| Mode: | ASCII | ||||
| Program(s) to Open: | Windows: Microsoft Excel 2007, previous versions of Excel with Open XML component support Macintosh: Microsoft Excel 2008, previous versions of Excel with Open XML component support | ||||
| Common: | |||||
| Extension: | |||||
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