ABSTRACT
As mentioned earlier, the elements in the discrete data representation correspond to discrete voltage levels or current magnitudes in the digital system hardware. If the digital system is required to manipulate only numeric data, for instance, it will be best to use 10 voltage levels, with each level corresponding to a decimal digit. But the noise introduced by the circuitry dealing with multiple levels of voltage for representation makes such representation impractical. Therefore, digital systems typically use a two-level representation, with one voltage level representing a 0 and the other representing a 1. To represent all 10 decimal digits using this binary (two-valued) alphabet of 0 and 1, a unique pattern of 0s and 1s is assigned to each digit. For example, in an electronic calculator, each keystroke should produce a pattern of 0s and 1s corresponding to the digit or the operation represented by that key.
