Abstract: A mail server identifies first keyword set including a keyword that is not included in a second keyword set, the key word being a keyword that appear in mail data with a frequency higher than a predetermined frequency, the mail data being extracted based on the second keyword set including a keyword used in extraction conditions of the mail data. Then, the mail server adds the first keyword set to the extraction conditions of the mail data.

Abstract: An information acquisition device includes one or more memories, and one or more processors the one or more memories and the one or more processors configured to receive first data of a first Web page, when the first data includes a specific character string and a uniform resource locator, perform determination of a value of a layer as a target of search in accordance with a distance between the specific character string and the uniform resource locator, receive second data of a second Web page corresponding to a first layer within the determined value of the layer from the first Web page, and determine whether the second data satisfies a specific condition.

Abstract: A mail server displays a list of mail addresses of the sources of mails matching with an extraction condition for inappropriate mails, the list being classified into levels which are divided according to the transmission status of mails matching with the extraction condition for each mail address. Then, in response to the selection of one of the mail addresses from the displayed list, the mail server displays the transition of the transmission status of the mails which match with the extraction condition and have the selected mail address.

Abstract: A mail server displays a list of mail addresses of the sources of mails matching with an extraction condition for inappropriate mails, the list being classified into levels which are divided according to the transmission status of mails matching with the extraction condition for each mail address. Then, in response to the selection of one of the mail addresses from the displayed list, the mail server displays the transition of the transmission status of the mails which match with the extraction condition and have the selected mail address.

Abstract: A mail server identifies first keyword set including a keyword that is not included in a second keyword set, the key word being a keyword that appear in mail data with a frequency higher than a predetermined frequency, the mail data being extracted based on the second keyword set including a keyword used in extraction conditions of the mail data. Then, the mail server adds the first keyword set to the extraction conditions of the mail data.

Abstract: The load balancing system comprises a first load balancing apparatus (primary), a first load balancing apparatus (secondary), and a first load balancing apparatus (backup), which carry out load balancing by primary-sorting service requests from clients to service sites; and first and second secondary load balancing apparatuses which carry out load balancing by second-sorting the service request which has been primary-sorted by the first load balancing apparatus (primary), the first load balancing apparatus (secondary) and the first load balancing apparatus (backup), to one of multiple servers provided in the site.