Some portions of the detailed description that follow are presented in terms of algorithms
and symbolic representa tions of operations on data within a computer memory. These
algorithmic descriptions and representations (eg, in the form of flow charts) are the means
used by those skilled in the computer Science arts to most effectively convey the substance
of their work to others skilled in the art. An algorithm is here, and generally, conceived to be
a self consistent sequence of steps leading to a desired result. The steps are those requiring …