A computer app, or application, is a program that performs a specific function on a computer. There are all sorts of computer apps, from simple utilities to complex productivity suites.

Computer apps can be installed on a computer in a variety of ways. They can be downloaded from the internet, purchased in a store, or installed from a disc. They can also be installed automatically from a website, sometimes without the user even knowing.

Once installed, most computer apps can be opened by clicking on an icon on the desktop, in the Start menu, or in the taskbar. Some apps …