XLS may be defaulted to Microsoft Excel, and when opening the file, it opens in Microsoft Excel. With a program, the default program is what program opens when opening a certain file type, more commonly known as the file association. For example, when opening Microsoft Word, the default font setting is a font size of 11. When talking about settings of a program, the default settings are the settings chosen by the software developer and not the user. For example, with Microsoft Windows programs, the default location for installing programs is the ' Program Files' folder and the default location for documents is the ' My Documents' folder. The default location is where a program defaults to first when saving or installing a program.