An application, or app, is a software program that performs a specific function on a computer. Applications can be installed on a computer from a CD, DVD, or downloaded from the Internet.

Applications are used to perform a wide variety of tasks, from word processing and spreadsheet calculations to playing games and watching movies. There are literally thousands of different applications available, both free and commercial.

Applications are typically grouped into categories, such as business, education, entertainment, and so on. Some applications are specific to a certain type of computer, such as a Mac or PC.

Applications can be run …