A method and apparatus are provided for executing a plurality of applications. Based on receiving a first user input, a first window comprising a plurality of number keys is displayed. Based on a second user input selecting one of the plurality of number keys in the first window, the first window and a second window are displayed together on the display. Based on an application being selected from a list of applications in the second window, the selected application is mapped to the selected number key. After the selected application is mapped, a third user input is received corresponding to the selected number key. In response to receiving the third user input, a first function is performed associated with the selected application. The first function is different from a function associated with another application mapped to another number key of the plurality of number keys.