Abstract: A system and application for extending the display of a computer to a mobile device is described. The system is configured to interface a mobile device with the computer, so as to enable a portion of the screen of the computer, such as toolbars, applets, menus, color palettes, and other application features to be displayed on the mobile device. Effectively, the system converts the display of the mobile device into a secondary display for the computer. Touch input is mapped to mouse input for the computer, enabling the user to manipulate applications running on the computer via touch input on the mobile device. The system employs Bluetooth, WiFi, and/or a cable to connect the mobile device to the computer. Preferred embodiments employ wireless technologies to facilitate the connection, and do not necessarily require an internet connection.