An agitating device is provided that may be mounted inside a rotating nut hulling tub for increasing the agitation of the nuts, thereby increasing the hulling speed, especially important for pistachio nuts. In said first mode a limited number of bar code symbologies or types are read, as part of the scanning process. Storing base-3 data words in such CAM cells increases the data storage density of associated CAM arrays. Responsive to activating the read word line coupled to the read circuit of the selected memory cell from which data is to be read, data can be coupled from the latch circuit of the selected memory cell with a respective read bit line through the read circuit of the selected memory cell. At least one of the stages may be separated from the remaining stages. In addition, a computer readable medium encoded with a computer program is described that identifies position of colonies relative to the positioning structures.