Abstract: A personal terminal of an image sharing system transmits distribution request information to a server each time a start of an image sharing process is recognized and downloads shared terminal information of a shared terminal as a destination and personal-terminal image sharing software from the server. Then, the personal terminal runs the personal-terminal image sharing software without installation thereof and transmits/receives an image to/from the shared terminal as a destination corresponding to the shared terminal information not through the server to perform the image sharing process.

Abstract: In an image display system, the control device (110) of a host computer (100) performs an image displacement process in accordance with a program stored in a USB memory (120). By the image displacement process, a pointer (300), which is an image, is displaced between the main display (140) of the host computer (100) and the sub display (220) of a display apparatus (200). Moreover, the sub display (220) is authenticated on the basis of authentication information (122) stored in the USB memory (120) in advance, and is clarified at the stage that the USB memory (120) is attached. Moreover, in the displacement of the pointer (300), if the pointer (300) is deviated from the screen with regard to the operation for displacing in any direction on the main display or sub display, the pointer (300) is displaced from one display to the other display, and the displacement direction is maintained.