For the everyday user, vector graphics are something you will rarely use if you don’t have the software to open them (such as Adobe products and QuarkXPress). Most people will refer to vector graphics as an .eps file. They may also us a .ai extension for Illustrator files. While you may not ever personally use these files or even have the programs to open them, it is very important NOT to delete your vector image files. If you ever plan on having graphic design work done or want your logo placed on promotional items you will be asked for vector graphics files.