An electronic device, a communication system and method, an information processing terminal and method, and an information processing apparatus and method capable of easily and rapidly performing communication. When a link pin (21A) is inserted into a VCR (3), the VCR (3) reads a pin ID stored in an RF tag of the link pin (21A) and reports the pin ID and the address to a management server (1). When the management server (1) has already acquired a pin ID of the link pin (21B) read out by a television receiver (5), the management server (1) determines whether a group ID included in the pin ID reported from the VCR (3) is identical a group ID included in the pin ID reported from the television receiver (5). If the group IDs are determined to be identical, the VCR (3) is connected to the television receiver (5). The present invention can be applied to various information processing apparatuses connected to the network.