Qualifications are made up of courses. Some universities call these papers. Each course is numbered using six digits.
The fourth number of the course code shows the level of the course. For example, in course 219206, the fourth number is a 2, so it is a 200-level course (usually studied in the second year of full-time study).
Each course is worth a number of credits. You combine courses (credits) to meet the total number of credits needed for your qualification.