A subject number is a designation for a topic of study. Subject numbers are used to differentiate different study courses with lower numbers indicating introductory level material, and higher numbers indicating advanced level material.

The most common subject number is 101, a number highly associated with the most basic of beginner level material. Subject numbers may appear in a classroom environment, or appear on reading materials. Subject numbers may also be mentioned through dialogue by an instructor, or teacher.

See also

• title_number