Abstract: Problem: To provide an email file-and-refer system or program capable to easily and conveniently search a desired email from received or sent emails. Resolution Means: The email link process displays sorting marks to sort the received or sent emails dividing into each of the plural hierarchies where the sorting mark belongs, executes the link process to link them to the emails based on the operation of the operation unit, and executes a text information input process based on the operation of the operation unit. The email search process performs a display process dividing into each of the plurality of hierarchies, executes a designating process based on the operation of the operation unit, and executes an extract process based on the operation of the operation unit.

Abstract: Problem: To provide an email file-and-refer system or program capable to easily and conveniently search a desired email from received or sent emails. Resolution Means: The email link process displays sorting marks to sort the received or sent emails dividing into each of the plural hierarchies where the sorting mark belongs, executes the link process to link them to the emails based on the operation of the operation unit, and executes a text information input process based on the operation of the operation unit. The email search process performs a display process dividing into each of the plurality of hierarchies, executes a designating process based on the operation of the operation unit, and executes an extract process based on the operation of the operation unit.

Abstract: Portable container comprising an inner cup to contain food or drink and an outer cup to be filled with heat exchange medium so as to keep food or drink contained in the inner cup warm or cool, or to be warmed or cooled when said cups are engaged with each other. Said inner cup is naturally made of a material having good thermal conductivity at least in the bottom and a part of the circumferential wall thereof, while the outer cup and the remainder part of the inner cup is preferably made of thermally insulating material.