A gate is operatively secured to the three-point hitch of a vehicle such as a tractor or the like and is movable between a forwardly extending transport position at one side of the vehicle, a substantially vertically disposed second position, and a third rearwardly extending position to close an opening in a fence or the like. Certain embodiments of the system include a local storage for storing a markup language file and token resolution information and a markup language viewer for processing the markup language file. A stem having first and second ends extends outwardly from the accessory. On the other hand, another band-pass filter extracts, from the output of the squaring circuit, a spectrum component corresponding to spectrum spreading due to a distortion in a transmission circuit.