An information terminal according to the present invention is provided where a telephone number is directly extracted from a window displayed, and call dialing is performed based upon the extracted telephone number. In the information terminal, a control OS execution circuit 7 extracts character information 111 including a numeral from a window such as a word processor window displayed the display 6 while a word processor OS is functioning, by designating its contained region with the display inversion, or with a frame enclosing the region. It then extracts no more than a numeral from the character information, and displays it in a telephone call dialing window (a first window), with the help of the telephone OS execution circuit 8. It then call-dials, based upon the displayed numeral, to a telephone line L.