A shared terminal that displays an image to be viewed by a plurality of users on a display, comprising: obtaining means (28, 201, 219, 219a) for obtaining, from a first privately-owned terminal (3, 4) owned by a first user, first terminal identification information for identifying the first privately-owned terminal (3, 4); transmitting means (21, 201, 205) for transmitting a first login authentication request together with the first terminal identification information obtained by the obtaining means (28, 201, 219, 219a), to a terminal management server that stores, for each of the plurality of users, a user name of a user identified by user identification information in association with terminal identification information identifying a privately-owned terminal (3,4) owned by the user; receiving means (21, 201, 205) for receiving a first user name of the first user, the first user name being transmitted from the terminal management server based on a successful login result for the first login authentication request, the successful login result being obtained when the terminal management server determines that the first terminal identification information is stored in the terminal management server; and display control means (24, 213) for controlling the display; wherein the display control means (24, 213) is configured to control the display to display a folder selection screen upon the first user pressing a Save button on the display in order to save new electronic file data; wherein the folder selection screen includes a USB memory button, a shared folder for temporary saving button and a private folder of the first user name button, and the first user selects to store the new electronic file data in a USB memory by selecting the USB memory button or in a shared folder for temporary saving by selecting the shared folder for temporary saving button or in a private folder of the first user name by selecting the private folder of the first user name button. obtaining means (28, 201, 219, 219a) for obtaining, from a first privately-owned terminal (3, 4) owned by a first user, first terminal identification information for identifying the first privately-owned terminal (3, 4); transmitting means (21, 201, 205) for transmitting a first login authentication request together with the first terminal identification information obtained by the obtaining means (28, 201, 219, 219a), to a terminal management server that stores, for each of the plurality of users, a user name of a user identified by user identification information in association with terminal identification information identifying a privately-owned terminal (3,4) owned by the user; receiving means (21, 201, 205) for receiving a first user name of the first user, the first user name being transmitted from the terminal management server based on a successful login result for the first login authentication request, the successful login result being obtained when the terminal management server determines that the first terminal identification information is stored in the terminal management server; and display control means (24, 213) for controlling the display; wherein the display control means (24, 213) is configured to control the display to display a folder selection screen upon the first user pressing a Save button on the display in order to save new electronic file data; wherein the folder selection screen includes a USB memory button, a shared folder for temporary saving button and a private folder of the first user name button, and the first user selects to store the new electronic file data in a USB memory by selecting the USB memory button or in a shared folder for temporary saving by selecting the shared folder for temporary saving button or in a private folder of the first user name by selecting the private folder of the first user name button.