Many minicomputer systems are programmed using instructions written in octal form. The base of the octal number system is 8 and it uses numerical symbols from zero through seven (0 -7). That is 0, 1, 2, 3, 4, 5, 6, 7.

**Equivalent Binary and Octal Numbers:** The table 14.1 below shows all 3- bit binary number and their octal equivalents.

Table 14.1: Equivalent and binary and octal numbers.

**Octal Binary Numbers**