Digital Electronics (Number System) described a number of different binary codes that are used to perform a range of functions in digital circuits. Mathematics, graphics, data manipulation and physical control systems are among many of the functions that are carried out using binary data, and each of these uses may require binary data arranged in various forms of binary codes. For example text may be represented by an ASCII code (American standard Code for Information Interchange), in which each letter, number or symbol is represented by a 7-bit binary code. Decimal numbers in a calculator may be sent to a numeric display using BCD (Binary Coded Decimal) Notice that the word ‘code’ appears in each of these titles, and a binary code differs from normal binary because it is arranged in a particular way to suit a given purpose.