Abstract: A system for processing picture information adapted for combining or switching picture informations, one of which is obtained by a process of a Central Processing Unit and another of which is supplied from an external appliance. The system includes a device for detecting the presence of second picture information and informing the Central Processing Unit of same. The Central Processing Unit is controlled to perform the selection between two types of picture information in accordance with the operation of the detecting and informing device. The combination or selection between two types of picture information is thus performed by a software for operating the Central Processing Unit.

Abstract: A holder in which a bubble cassette housing a bubble memory device is inserted. The contacts of the holder contact the contacts of the cassette when the cassette is inserted into the holder, so that current can flow into the bubble memory device. The holder contains a detector for detecting the insertion and withdrawal of the cassette. A circuit controls the current introduced into the magnetic-bubble memory device so that the current is introduced after the contacts of the cassette and the contacts of the holder are connected and is interrupted before the contacts of the cassette and the contacts of the holder are disconnected.

Abstract: An item input device for a data processing system wherein plurality of flexible page sheets with input information provided thereon overlap the circumference of a rotating shaft in the device main unit and the fixed ends of the sheets are separated by a constant space. The desired page sheets are selected through rotation of the rotating shaft in the winding direction and the reverse direction of the page sheets, thereby guiding the page sheets to the display location. The page sheets overlap each other such that the page sheet unit has the page sheet ends bound thereto separated by a constant space thus the page sheet unit is formed separately from the rotating shaft. The page sheet unit is taken up to the rotating shaft in the page selection ready condition by rotation in the winding direction, and the page sheet unit taken up is released from the rotating shaft by rotation in the reverse direction. Moreover, a clamping member for holding the winding condition of the page sheets is provided.