Abstract: A system (FIG. 1) for secluding a zone in which it is completely surrounded by a light beam barrier (14) such that any object or person striving to cross the barrier invokes an alarm if the crossing complies with various conditions The barrier is a continuous light beams formed using one light source (12) The light beam is projected from the source at one end of a path, and finally impinging on a light detector (22) The deflected light beam of the invention forms an envelope of a voluminous virtual body, that which is regarded as a seclude volume.

Abstract: Virtual Desktop—Meta-Organization & Control System wherein a real-time-accessible memory media having at least one dynamic substantially cyclic electronic-data structure is associated (by an ongoing algorithmic activity for respectively regularly transforming each process of a plurality of processes running in the environment) into an associated graphic representation, and logically assigns the representation to a location in the data structure—such that for the data structure, a graphic user interface facilitates viewing of the representations assigned to at least one of the data structures and facilitates organizing of the at least one data structure.