Electronic recording appliances, operating control equipment and control units in agricultural machines and appliances, particularly for listing or recording of borderlines of driving lines of guidance along given or drawn lines, namely, computers, microprocessors, computer chips, disc drives, computer interface computer hardware and other computer peripherals; software for agricultural use, namely, computer software used to list or record borderlines, driving lines or guidance along given drawn lines and used to plan, perform, and control agricultural, gardening and earthmoving operations; equipment and instruments for fiber optic technology, namely, optical transmitters, optical receivers, optical fibers, and remote controls for fiber-optically operated computer networks; printer, display monitors, scanners and modems; data carriers in the nature of blank computer discs and CD ROMs; navigation and position detecting appliance and global positioning devices, namely, antennas, computers and software used to process positions of objects and for navigation radio signal receivers and sensors used for detecting the position and movement of a vehicle, and transmitters for transmitting position data