| DO | an honorary degree in the humanities |
|---|---|
| DO | an honorary law degree |
| DO | a doctor's degree in medicine |
| DO | a doctor's degree in music |
| DO | a doctor's degree in musical arts |
| DO | a doctor's degree in optometry |
| DO | doctor's degree in osteopathy |
| DO | a doctorate awarded for original contributions to knowledge |
| DO | a doctor's degree in preventive medicine |
| DO | an honorary degree in science |
| DO | a leading theologian in the history of the Roman Catholic Church |
| DO | a doctor's degree in theology |