BearPup sometimes wants to open a file in one program, and other times open it in another. He asked the Answer Line forum for an easy way to do this. Windows uses a file’s extension–the part ...

Red Eye Rose received a file with a strange extension. She doesn’t know into what program she should load it. Neither does Windows. I doubt that anyone knows all of the file extensions used ...

Show or Hide Extensions for All Files in iOS. Since iOS 11, Apple's Files app has made file management a more realistic proposition on ‌iPhone‌ and ‌iPad‌.