Abstract: A distributed database of a peer-to-peer network is provided. In the network, a group is composed of plural nodes, and the nodes in the group each have CPU and a state list memory. CPU of each node sends other node a request for information to obtain and store node-state information. The node-state information is delivered through a prescribed route among the nodes in the group. When the number of nodes participating in the group increases more than a prescribed number, the participating nodes are separated into plural groups.

Abstract: A distributed database of a peer-to-peer network is provided. In the network, a group is composed of plural nodes, and the nodes in the group each have CPU and a state list memory. CPU of each node sends other node a request for information to obtain and store node-state information. The node-state information is delivered through a prescribed route among the nodes in the group. When the number of nodes participating in the group increases more than a prescribed number, the participating nodes are separated into plural groups.

Abstract: When an information processing device expands and displays a received web content item into a web page, the device analyzes the received web content item and extracts columns respectively as constitutive units forming a layout of the web page, compares each of display areas of the columns with a threshold, in a display state of the web page by a display device, and thereby determines whether each of the display areas is sufficient or not. If the display area of any of the columns is not sufficient as a result determined, the information processing device summarizes content of the any of the columns, depending on the display area, adapts summarized content of the any of the column into a preview display format depending on the display area, and displays the adapted content on the display device.