This app can be a kind of virtual tablet or virtual laptop or virtual desktop or oversized monitor in virtual space. Every VR user can use this app to perform touch input , dragging input on the display of a virtual PC,  or input letters with virtual stylus pens and virtual keyboard, just like using a tablet PC in a real environment. Not only menu selection by instantaneous touch input, but also drawing and writing by continuous touch input can be precisely implemented at very high speed. A feed back system that visually changes a part of the pen according to the distance between the pen tip and the display surface helps VR users to draw or write more precisely and quickly. A function to selectively enlarge the touch area of the display has been added, because it is difficult to sufficiently recognize the tablet-sized display in virtual reality at the current technology level. The virtual keyboard can be moved on the display and is semi-transparent or almost transparent, so that th...