Abstract: An information processing device of the present invention includes a connecting section which connects application modules capable of performing application processing, a receiving section which receives an electronic mail including a command transmitted from a terminal device, an interpreting section which interprets the command included in the electronic mail received by the receiving section, a designating section which designates, from among the application modules connected by the connecting section, an application module corresponding to the command interpreted by the interpreting section as the execution destination of the command, an acquiring section which acquires a processing result of processing performed by the application module designated by the designating section, and a transmitting section which creates a response electronic mail with the processing result acquired by the acquiring section as a response, and transmits the response electronic mail to the terminal device.

Abstract: Disclosed is a wireless communication system including: a controller and a plurality of communication terminals connected to each other for communication, and the controller includes: a first wireless communication section; a communication number control section which counts a communication number of each of the communication terminal communicated and stores the number in the storage section; and a first communication control section which sets back off information indicating priority of communication of the communication terminal according to the communication number stored in the storage section and transmits the back off information through the first wireless communication section to the communication terminal, and the communication terminal includes: a second wireless communication section; and a second communication control section which sets the back off time of communication with the controller shorter as the priority becomes higher based on the back off information received from the controller.

Abstract: In a system having a plurality of apparatuses connected via a communication line, one apparatus serving as a master unit performs processing on data stored in the other apparatus or apparatuses. The apparatus serving as a master unit generates a work designation message containing a program statement and transmits it to the other apparatuses. The apparatus, receiving the message, performs data processing based on the message and transfers the message to another apparatus in a predetermined order. All the apparatuses connected to the communication line perform processing based on a received message and the processing is completed when the message is returned back to the master unit.