An image forming apparatus includes an application on a framework, that is separated into a core logic portion handling basic processing and a user interface frame portion handling rendering processing and operates; and a controller that executes the application and the framework. The core logic portion is implemented with an application programming interface defined by the framework and is loaded in a memory by the framework at activation of a system. At least a first area and a second area for screen display are ensured in the memory. Home screen data is loaded in the first area. Alert or fault screen data is loaded in the second area.