Abstract: A method and system for generating command signals for a computer monitor or other equipment. The system includes at least one pressure responsive potentiometer and a device operatively connected with such potentiometer for generating a command signal indicating at least one of the direction, intensity and duration of pressure applied to such potentiometer. The method remotely controls a function of a computer monitor or other equipment in response to signals obtained from pressure sensitive potentiometers manipulated by a user.

Abstract: A vegetation cutting head is mounted on a tractor by an articulated boom. A hydraulic cylinder attached to the boom rotates the cutting head about an axis transverse to the distal end of the boom. A second hydraulic cylinder rotates the cutting head about an axis parallel to the plane of operation of the cutting head. A third hydraulic cylinder rotates the cutting head about an axis orthogonal to both of the first two axes. The cutting head can be operated while the boom is at any horizontal angle from 0.degree. to 90.degree. of the direction of travel of the tractor.