| 摘要 |
PROBLEM TO BE SOLVED: To solve problems of high cost and wasteful energy, which are not good for the environment and economy, in a kit prepared for a specific purpose of use and having generality, because it includes contents not used depending upon the properties of individual users. SOLUTION: In a main content of this kit for specific purpose of use, an information storage means is retained and an information for defining the user is stored in addition to information for defining the content. During use, the stored information of main contents not used is read by a reader and stored in a computer. The main contents not used for a plurality of times are defined so as not to be included in the kit. |
