A first information processor executes a program or a routine which uses wireless communication and transmits, while the program or the routine is being executed, identification information for identifying the program or the routine to an unspecified apparatus. A second information processor receives the identification information transmitted from the first information processor to the unspecified apparatus and selects, from among a plurality of programs or a plurality of routines stored in the second information processor, a program or a routine corresponding to the identification information as a program or a routine to be executed.