Summer Term 1971 through Summer Term 1998
001-099: Remedial of Preparatory, Non-credit
100-199: Undergraduate - Freshman Level
200-299: Undergraduate - Sophomore Level
300-399: Undergraduate - Junior Level
400-499: Undergraduate - Senior Level
500-599: Master Courses
600-699: Advanced Master Courses
Autumn Quarter 1962 through Spring Quarter 1971
001-099: Remedial or Preparatory, Non-credit
010-099: Terminal Courses
1-99: Lower Division Courses
100-199: Upper Division Courses
Beginning with the School Year 1936-37 through Summer 1962
1-49: College Grade (transfer) courses
50 and above: Terminal Courses