Step S10: the user US uses the terminal apparatus TMu to register “5” business cards MSr received from the “5” other persons TS into the printing management apparatus PK. In other words, in the printing management apparatus PK, the CPU 12 (shown in FIG. 2) serves as the communication section 21 and the acceptance section 22 (shown in FIG. 8) to accept the registration of the business cards MSr of the other persons TS through the network NW from the CPU 32 which serves as the communication section 41 (shown in FIG. 10) of the terminal apparatus TMu.

Step S11: when having accepted the registration of the “5” business cards MSr of the other persons TS in the step S10, the CPU 12 in the printing management apparatus PK serves as the calculation section 23 (shown in FIG. 8) to reduce the remaining number ZM of the business cards MSt of the user US accordingly in the remaining number database ZMDB (shown in FIG. 3). Thus, the remaining number ZM is changed from “31” to “26”, as shown in FIG. 3. In other words, the CPU 12 estimates that the remaining number of the business cards MSt of the user US has changed to “26”.