Octal notation is a method of representing numbers using a base-8 system. It's commonly used in the computer science and electronics fields. Other terms that can be used interchangeably with octal notation include octal number system, base-8 numeral system, and octal coding. Each of these terms describes the same concept of representing numeric values using eight digits: 0, 1, 2, 3, 4, 5, 6, and 7. This differs from the more commonly used decimal system, which utilises ten digits: 0-9. By learning synonyms for octal notation, you can expand your understanding of this numerical system and its applications in technology.