An information processing apparatus is provided which includes: a first managing part for managing first data about preferences of a user; a second managing part for managing second data about information; a retrieving part for retrieving the second data about the information used by the user; and an updating part for updating the first data by use of the second data retrieved by the retrieving part. If the second data are found to exist within the first data, then the updating part updates the first data using the second data; if the second data are not found to exist within the first data, then the updating part adds the second data to the first data.