A method, terminal, and computer program are disclosed to reduce radio interference in a wireless communications device having a combination of a wireless telephone unit, such as a GSM cellular phone, and a short range wireless communications unit, such as a WLAN communications unit or a Bluetooth communications unit. Specific plug and socket contacts utilize a simple electronic device that causes the switching circuit associated with either or both the plug and socket to be activated only when the plug and socket pair is fully engaged. The electronic apparatus may detect whether an input track is generated. In some embodiments, the at least one motor can include a clamping motor andor a firing motor. An association module may associate, using an application programming interface, a user attribute of a second electronic game of the plurality of electronic games different from the first electronic game, the association module associating based on a rule engine implemented by the API and at least one of the user attribute of the first electronic game and game data of the second electronic game. A transition metal-reducing layer which has self-assembled on the surface of the positive electrode active material in contact with the reaction suppressor owing to reaction of the transition metal with the polyanion structure-containing compound, has a thickness of 10 nm or less.