Apps are coded instructions in the form of programs that perform certain tasks. It can run on the Internet, on your computer, or on your phone or other electronic device. The word "app" is a more modern usage, but an app is the same thing as a program.

Chandler, Daniel–Munday, Rod (2011): A Dictionary of Media and Communication. Oxford University Press. Oxford. 18. p. See the Online Edition

Manovich, Lev(2008): Software takes command. Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License. Retrieved: 01.11.2014