Remote access to schematic drawings

-An electronic information system for storing, transmitting, receiving and displaying electrical circuit schematics is presented. The schematics are binary coded for computer storage and for transmission over telephone grade communications lines. A complete schematic can be transmitted in a matter of a few seconds with no degradation in the image quality. A standard set of schematic symbols and the associated alphanumeric characters are stored at the receiver in the character matrix of a shaped beam tube. Only the information as to the location of each schematic symbol in the character matrix and the organization of the schematic symbols is stored and transmitted.