Aspects of a scheduler for an adaptable computing engine are described. When the level two controller detects that a line is valid and dirty in level one, the level two memory need not update its copy of the data. The touch sensitive pads are divided into sections, and software is used to interpret different finger gesture combinations on the sections of the touch sensitive pads, which produce text or issue commands to the handheld electronic device. Also provided is a SERS nanoimager for dynamic chemical imaging using the nano-imaging probe and methods of imaging and Raman spectral analysis and identification using the nano-imaging probe. In another aspect, the invention provides sanitized or sterilized material, and especially animal bedding material, prepared using the described compositions and methods. The location of the remote screen on the probe permits the individual to probe a circuit or some other test point while at the same time looking at the results of the probing without having to shift one’s gaze from the probe to the particular test instrument so that the individual doing the probing can maintain the probe at the correct location.