Octal

Octal is a base-8 numeral system that uses eight distinct symbols to represent values: 0, 1, 2, 3, 4, 5, 6, and 7. In the octal system, each digit's place value is a power of 8, much like the decimal system (base-10) uses powers of 10, and the binary system (base-2) uses powers of 2.