Patent ID: 7956853

Claim:
An apparatus operating system comprising: an operation menu storage unit for storing a plurality of operation menus, each operation menu including a plurality of operation items as a list to operate a given apparatus; a display unit for displaying each operation menu; and an input operation apparatus enabled to input at least one of an operation direction and an operation amount, wherein when a first operation is applied to the input operation apparatus with no operation menu displayed, one of the operation menus that is previously associated with the first operation is displayed by the display unit, and when a second operation is applied to the input operation apparatus with one of the operation menus displayed, an intended operation item included in the one of the operation menus is selectable based on the second operation, the input operation apparatus is a rotary switch to which a rotation operation is applied and which is enabled to input at least one of a rotation direction being the operation direction and a rotation angle being the operation amount, further comprising: a biasing unit for biasing the rotary switch to return to an initial position when a rotation operation is applied to the rotary switch; and a menu deleting unit for deleting an operation menu, which is displayed when the rotation operation is applied, when the rotary switch returns to the initial position by the biasing unit after the rotation operation is released.