An order picking system having a system for transferring an article from a source container to a reception container. The optical coupler system is for coupling radiation from a plurality of radiation sources. The differentiation between the memory cells in the ways may be implemented by devoting different amounts of integrated circuit area to each memory cell either by changing the size of the transistors comprising the memory cell or devoting additional transistors to each memory cell in the form of shared error correcting codes or backup memory cells. In one instance, cycle removal eliminates perpetuation of errors throughout a system being analyzed. Such sliding lock is loosely attached, and will fall into a cable-locked position when not held up. 5 A \u215b inch by 6 inch steel rod bent in a described manner as to hold 2 foundation rebars independent of components 1 through 4.