A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the ...

A file extension is a suffix that is added to the end of a file name after a dot. It is usually two to four letters long. File extensions help Windows and other operating systems to know the standard ...

Oct. 15 is the tax filing deadline for people who requested an extension Written By Written by Contributor, Buy Side E. Napoletano is a contributor to Buy Side and an expert on student loans, taxes ...