Octal System

This system has less symbols to use than conventional number system. Octal system uses the base or radix 8 to represent the quantities. They are 0, 1, 2, 3, 4, 5, 6, and 7. When we count up one from the 7, we need a new placement to represent what we call 8 since an 8 doesn't exist in Octal and so, after 7 is 10.