Step 1: Understand what a numeral system is. A numeral system is a way to represent numbers using symbols or digits.
Step 2: Identify the range of digits used in different numeral systems. For example, the decimal system uses digits 0-9, the binary system uses 0-1, and the hexadecimal system uses 0-9 and A-F.
Step 3: Look for a numeral system that specifically uses the digits from 0 to 7.
Step 4: Recognize that the numeral system that uses only the digits 0, 1, 2, 3, 4, 5, 6, and 7 is called the octal numeral system.
Step 5: Conclude that the octal numeral system is the answer to the question.