Abstract: A system for remotely operating a machine, such as a mine vehicle, includes at least one first emitter for emitting a first signal corresponding to a first zone adjacent to the machine. A transmitter is provided for receiving the first signal emitted by the emitter, the transmitter being adapted for issuing commands for controlling the machine and also indicating the presence of the transmitter in the first zone. A controller is also provided for controlling the machine based on the control signals from the transmitter based on the presence of the transmitter in the first zone. Related methods are also disclosed.

Abstract: A reminder card having a printed message is printed directly on the mailing envelope on the rear lower portion of the envelope and is perforated for easy removal. The reminder card is slipped into a window pocket on the front face of the envelope to display the reminder message. A base for forming the envelope into an upstanding display is formed by bending a flap on the bottom rear of the envelope upward into an arc and adhering the flap to a gummed flange formed from the outer edge of the sealing flap of the envelope to create a triangular shaped display capable of remaining upright. A magnetic strip glued to the envelope allows the envelope to be secured to a vertical ferrous surface.