Numbers that have been coded in a system where each digit is represented by four bytes (called a nybble) It was used by the business computers when calculating dollars and cents
Representation of decimal numbers in binary form using a groups of four bits to represent an individual digits (0-9) E g 0011 1000 = 3810
A coding system in which each decimal system numeral (0 to 9) is represented by a 4-digit (4-bit) binary code