bont know
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.jpg
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No, folders usually do not have file extensions, but they could have if you like. Usually only files have extensions, to indicate the contents of the file.
JPG,GIF,Bmp
File extensions are suffixes added to the end of a filename, typically consisting of a period followed by a few letters, that indicate the file type and format. Common examples include .txt for plain text files, .jpg for image files, and .docx for Microsoft Word documents. They help operating systems and software applications recognize how to open or process different files. Overall, file extensions play a crucial role in file management and organization.
They're used as extensions to identify picture files.
MP3 sound files have an .mp3 file extension, and common file extensions for raw, uncompressed sound files are .wav and .aif. Pg. 474
To have common file extensions visible when viewing files, you can enable the option to show file extensions in your operating system's settings. For example, in Windows, you can go to File Explorer, click on the "View" tab, and check the box for "File name extensions." On macOS, you can go to Finder, select "Preferences," then check "Show all filename extensions." This will allow you to see the extensions for all files in the file manager.
video files (mpg file extension, MPEG file format). It is the same video file format. You can use booth file extensions.
Windows hides file extensions in File Explorer by default for known file types to simplify the user experience and reduce clutter. This setting can be adjusted in the Folder Options menu, where users can choose to show file extensions for all files. The option is typically turned on for security reasons, as displaying extensions can help users identify potentially harmful files. To view file extensions, users can enable the "File name extensions" checkbox in the "View" tab of the Ribbon in File Explorer.
There is list of programs that support DO file extension http://www.howopen.org/en/extensions/web-files/do
File extensions tell us what kind of file it is.For example, a .pdf extension tells us that it is an Adobe Acrobat file.Files with the extensions of .jpg, .jpeg, .png, and .bmt are all picture files. (This is not an extensive list of picture files, just an example).Other types of files like .doc, .dot, .dotx, .docx, are Word files. There are many more file extensions for that.Powerpoint files have extensions like .ppt and .pptx.Windows media files have extensions like .wmv.Every software program has its own extensions that identify what it is.In Windows Explorer (or Apple equivalent), you can organize your files by file type if you're looking for a specific type of file. It's also really helpful if you're tracking statistics on file types and usage, or finding a file that you need to use again.The sort by file type feature is very handy when you have a high volume of files in a directory and you're looking for a document of a specific type.If you don't know where you placed your file, you can do a global search on the file type (if you know it) and your computer will give you search results showing only the files with that extension.
In QuickBooks Desktop, file extensions are used to identify different types of files. For example, company files have the extension .QBW, while backup files use .QBB, and portable company files are denoted by .QBM. To file or manage these extensions, you can save or open the respective file types through the "File" menu, using options like "Open or Restore Company," "Back Up Company," or "Create Copy." Always ensure you have backups of your .QBW files to prevent data loss.
Emails are not files, so they do not have extensions.