A portable information processor (12-1, 12-n) having a sensor detecting a posture thereof, the information processor comprising: a transmission destination device determination section adapted to determine, from among a plurality of devices, a transmission destination device on a basis of the posture of the information processor identified on a basis of detection results of the sensor at a time of an input from a user using a first operation key of the information processor; a communication section adapted to receive information for a real space position for each of the plurality of devices; a positioning section adapted to measure the position, latitude and longitude, of the information processor using a global positioning system, wherein the transmission destination device determination section is adapted to determine, from among the plurality of devices, the transmission destination device based not only on a relationship, identified for each of the plurality of devices, between the real space position of each of the plurality of devices and a real space position of the information processor identified on a basis of the positioning results generated by the positioning section but also on the posture of the information processor identified on the basis of the detection results of the sensor; a transmission data determination section adapted to determine data content to be transmitted to the transmission destination device on the basis of the posture of the information processor identified on the basis of the detection results of the sensor at a time of an input from the user using a second operation key of the information processor later than when the transmission destination device is determined; and a transmission section adapted to transmit the data to the transmission destination device. a transmission destination device determination section adapted to determine, from among a plurality of devices, a transmission destination device on a basis of the posture of the information processor identified on a basis of detection results of the sensor at a time of an input from a user using a first operation key of the information processor; a communication section adapted to receive information for a real space position for each of the plurality of devices; a positioning section adapted to measure the position, latitude and longitude, of the information processor using a global positioning system, wherein the transmission destination device determination section is adapted to determine, from among the plurality of devices, the transmission destination device based not only on a relationship, identified for each of the plurality of devices, between the real space position of each of the plurality of devices and a real space position of the information processor identified on a basis of the positioning results generated by the positioning section but also on the posture of the information processor identified on the basis of the detection results of the sensor; a transmission data determination section adapted to determine data content to be transmitted to the transmission destination device on the basis of the posture of the information processor identified on the basis of the detection results of the sensor at a time of an input from the user using a second operation key of the information processor later than when the transmission destination device is determined; and a transmission section adapted to transmit the data to the transmission destination device.