The OSI model defines the application layer as being the user interface. The OSI application layer is responsible for displaying data and images to the user in a human-recognizable format and to interface with the presentation layer below it.
Examples of applications that utilize the network are:
- Instant Message software (AIM, MSN, ICQ, Yahoo)
- Microsoft Windows File Shares
- Web Browsers (Internet Explorer, Firefox, Google Chrome, Safari)
- Network games of Doom, Quake, Unreal (first-person 3D shooter video games)
- IRC (mIRC)