Answer: PRF (Personnel Readiness File/Folder) files are used in technical application and are not likely to be accessed by your average PC user. In general, PRF files are Windows system files, although they have other technical applications as well.
It is a Microsoft Publisher file.
Performance, If it's mil-dtl, it's detail
XLS is the shorthand for Microsoft Excel file extension. A file extension is the group of letters following a period in a file name, denoting what kind of file it is.
Hyper Text Markup.
Moving Picture Experts Group
Moving Picture Experts Group
What is the file extension What is the file extension
.html, .php, or .htm
To open PRF files on a MacBook, you can use a text editor like TextEdit or a code editor such as Visual Studio Code, as PRF files are typically plain text files. Simply right-click the PRF file, select "Open With," and choose your preferred text editor. If the file is associated with a specific application, you may also try opening it directly with that application if it's installed on your Mac.
A ".gdoc" is a file extension used by Google Inc. to store Google Documents.
file extension for video is 101
.b is an extension for binary files mostly used by video game emulators... .b is also the extension for BASIC programming language source text files...