An information processing apparatus includes a core unit configured to control an external device that is communicatively connected to the information processing apparatus; and a calling unit that is included in the core unit and is configured to call a plug-in that enables the external device to implement a predetermined function when controlling the external device. The plug-in, when called by the calling unit at a specific timing, interrupts a process related to the control of the external device performed by the core unit with a process related to the predetermined function provided by the plug-in.