IPL SYSTEM

PURPOSE:To shorten a transmission time by providing a main controller with an arbitrary transmission part of each of instructions into which resident instructions are divided and receiving an individual transmission request of an instruction, which is not normally received, from a terminal equipment to transmit this instruction. CONSTITUTION:In the IPL system where plural POS terminal equipments 120 are connected to a main controller 110, resident instructions divided into plural parts are stored in a main storage means 111 of the controller 110 and these instructions are transmitted from an arbitrary transmission part 133. A corresponding information storage means 143 in which reception information corresponding to each instruction is stored is retrieved by an individual request means 149 to output individual request information 147 which requests reception of the instruction which is not normally received. The transmission part 133 outputs this instruction in the means 111 in response to information 147, and the equipment 120 stores the instruction in a received divided instruction storage means 141 by a storage means 145.