ON-BOARD DEVICE, INFORMATION PROCESSING METHOD, AND COMPUTER PROGRAM

An on-board device includes a processing unit, and a storage unit storing a plurality of programs that are executable by the processing unit, in which the processing unit acquires information relevant to the presence or absence of update that is provided from a server outside a vehicle, stores the acquired information relevant to the presence or absence of the update in a sharing area by executing an input/output function that is different from an input/output function included in a basic program, and selectively executes the basic program or an update processing program after starting execution of a boot program, on the basis of the stored information relevant to the presence or absence of the update.