The development device of the present invention has a rotating shutter supported rotatably between a supply opening formed on a toner supply device and a receiving opening formed on a developing tank. Given the reservation of a requested agent, the allocated communication system is influenced such that the communication terminal equipment is transferred to the reserved agent communication terminal equipment. The inkjet recording apparatus controls whether to make the cleaning unit contact the discharge port surface based on the recording head temperature detected by the temperature sensor. The bus therefore provides a load signal that serves as arbitration between the system power capacity and the cumulative loads of the individual dice. This invention also relates to inbred corn lines derived from inbred corn line D054245, to methods for producing other inbred corn lines derived from inbred corn line D054245 and to the inbred corn lines derived by the use of those methods. Furthermore, a total sum T of the measured time periods Ton and Toff is evaluated, and the audio data is rendered invalid when the evaluated total sum T exceeds a term of validity Ta of the audio data recorded in a memory card 12.