NFO is an abbreviation of INFO which is an abbreviation for INFORMATION. In Microsoft Windows, a file with a *.NFO extension is opened with System Information (a program). Commonly, files with the *.NFO extension are not designed to be opened with System Information, but with a text editor or specially designed NFO viewers. These files are usually associated with software cracks/patches where the credits and information is stored. Usually, these files, once viewed with a text editor, have a large ASCII art logo at the top and information about the sofware crack/patch following the logo.
