In accordance with one aspect of the present invention, a cantilever of a probe-based instrument is deflected by directing a beam of ultrasonic acoustic energy at the cantilever to apply acoustic radiation pressure to the cantilever. The control circuit has a start pulse signal input terminal, a first clock pulse signal input terminal and a power supply voltage input terminal and includes a first control transistor and a second control transistor. , visual, audio, taste, smell or touch, to neural firing time differences in a human brain and using acoustic signals to generate the neural firing time differences. The application server obtains a predetermined number of object identifiers from the first and second tables to be stored in each of the application servers for servicing client applications related to the application server.