All credit courses offered by the university may be applied toward any degree or certificate granted, except as stated by each department.
The first figure in each number designates the group to which a course belongs:
| Course Number | Designation |
| 1000-1990 | Courses open primarily to freshmen |
| 2000-2990 | Courses open primarily to sophomores |
| 3000-3990 | Courses open primarily to juniors |
| 4000-4990 | Courses open primarily to seniors |
| 8000-9990 | Courses open only to graduate students |
College of Engineering (UNL) Course Numbering
| Course Number | Designation |
| 100-199 | Courses open primarily to freshmen |
| 200-299 | Courses open primarily to sophomores |
| 300-399 | Courses open primarily to juniors |
| 400-499 | Courses open primarily to seniors |
| 800-999 | Courses open only to graduate students |