Abstract: In a system for optically performing position detection and data communication, a transmitting apparatus has first and second light-emitting elements for position indication and data transmission. An image sensing element in a receiving apparatus senses the light-emitting elements. Position is detected from the sensed image of the first light-emitting elements using triangulation, and data communication is performed by blinking the second light-emitting element. This system is used in a hospital where the use of radio waves is restricted or outerspace where the system is exposed to strong electromagnetic waves.

Abstract: A data processing system for inputting data to a form display includes a scanner for inputting an image of a form document to the system, a processor for recognizing character and line patterns from the form document image supplied from the scanner to produce physical structure data of the document and logical structure data related to data input/output fields in the form document depending on the physical structure data so as to automatically produce based on the logical structure data a program to input data to the form display, a display screen for presenting thereon a form display defined by the physical structure data or normalized data obtained by correcting the physical structure data to be adaptive to a cursor pitch, a data input key apparatus, and a printer for producing a printout document based on the form display filled with the data.