| 摘要 |
<p>There is described a data selection and retrieval system wherein items of information can be retrieved by a user from a database. Control signals input by the user when manipulating retrieved data items are processed to indicate the level of interest which the user has in the data item. The user's level of interest and the content of the displayed data item are then compiled to form a list of the subject-matter in which the user has evinced an interest, and data items in the storage means which relate to similar subject-matter are then indicated as being of likely interest to the user.</p> |
