Abstract: A computer system comprises a computer body that is attachable to a user's body. A projection port is formed in the outer surface of a housing of the computer body. The housing contains therein a display element that projects an image outward from the housing through the projection port. The housing further contains therein a vibration detecting element for detecting vibration of the computer body, a discriminating element for determining whether or not the computer body is moving, in accordance with a vibration pattern detected by means of the vibration detecting element, and a main control element adapted to stop the image display by means of the display element when it is concluded by the discriminating element that the computer body is moving.

Abstract: A computer can be provided with small-sized, light-weight, and furthermore cableless features by efficiently positioning the components of the computer and display device. The computer system includes a wearable computer and a wearable display device provided independently of this computer. A display controller is installed in the display device, not in the computer. The computer controls the display controller by radio or wire.

Abstract: A composite document processing apparatus has a central processing unit (CPU), a document memory to store data of a composite document, an attribute memory to store attribute data, such as the location in the composite document, the area size and the type of each data stored in the document memory, a window/viewport memory to store display attribute data, such as the size of a window and the size of a viewport, and a video memory to store display data in an image form. The composite document processing apparatus further includes a display device, on which first and second viewports are defined. Based on the above two types of attribute data, the CPU contracts the display data in a first window area, which is set for the entire document stored in the document memory, and develops the data in the video memory in an image form in such a manner that the display area in the first window area is displayed in the first viewport, which defines a display area smaller than the first window area.