A projector zoom lens includes a first lens group having a negative refractive power and a second lens group having a positive refractive power. A rotary seed chamber is mounted in the housing adjacent the seed plate and movable between first and second positions, to permit the seed plate to singularly select individual seeds from the RSC while in a first position, and to dump seed therefrom as well as blocking seeds from entering the seed plate while in a second position. The first linking member includes a first proximal section that is coupled to the control device, and a first distal section that is engagable with the machine. Some aspects of the invention are directed to a system and method for remotely setting software traps for detecting software viruses and, upon execution of the traps, several methods for establishing a quarantine on infected devices. The digital network is connected with a coderdecoder.