ABSTRACT
Analogue systems represent a varying abstract quantity (e.g. temperature) by varying a physical quantity which serves as its analogue. If such a system is implemented using electrical technology the physical analogue may be a current or voltage1. In contrast, digital systems use an internal representation of abstract quantities by first assigning it a cardinal integer value and then representing each digit separately. Binary representation has a distinct advantage which
greatly simplifies implementation. The machine need only physically represent two digit values, 0 and 1.
