The is SketchUp's backup file. You will need a copy of SketchUp to view the file. If it won't open then rename the extension ".skp" and it should open.
Install Shield 5.5 (not express) apparently will allow you to view uninstall information from a file with the extension ".ISU"
What is the file extension What is the file extension
Configuration settings file can be viewed either in notepad or browser depending on the type of configuration file. If the configuration file has extension - "INI", then it can be viewed in notepad or textpad. If the configuration file has extension - "XML", then it can be viewed both in Notepad and Browser.
.html, .php, or .htm
file extension for video is 101
regedit regedt32
The file extension tells about the type of file, with the extension three letters. For Eg:- *.txt -- text file *.exe-- executable file
file extension
the extension of a batch file is ".bat"
The file extension is ".pages"
The file extension of iPhone firmware file is .ipsw .
The extension .jpeg tells us the file is an image file