Abstract: In an e-mail creating/sending device, an ID corresponding to attached data representing image or voice/sound included in multimedia data is generated. This multimedia data with attached data converted to the ID is sent to an e-mail receiving/reproducing device via a network. In this e-mail receiving/reproducing device, real data corresponding to the ID is generated and image or voice/sound represented by this real data is reproduced. The attached data, ID and real data are categorized and registered and an approximate ID or real data substitutes based on the category.

Abstract: A method of designating an object including the steps of: designating a certain point on a display unit 3 utilizing an input unit 2 such as a mouse and coordinate-transforming at a coordinate transformation unit 4, calculating an association degree between a detection point and an object displayed on display unit 3 according to a table 7 of association coefficients defined between attributes provided to objects displayed on display unit 3 depending upon the distance between them and an attribute provided to the detection position, thereby selecting an object having the maximum association degree.