Each internal order, previously called a work order, begins with alpha characters. These characters correspond to the area where the work was performed.
W: FMD Internal Orders
| WDU | Duke Vehicle Orders |
| WH | Residence Life and Housing Services |
| WL | Marine Lab Orders |
| WS | University Standing Internal Orders |
H: Engingeering & Operations Internal Order
| HA | Hospital ADA |
| HCU | Hospital Outside Customers |
| HDUMC |
Hospital Vehicles |
| HI | Hospital MC Instrument |
| HKE | Hospital Key Shop |
| HM | Hospital Maintenance Shops |
| HN | Hospital North Shops |
| HRS | Hospital Refrigeration |
| HS | Hospital South Clinics Shops |
| HST | Hospital Standing Building Orders |
| HV | Hospital Technical (Energy Management Shop) |
| HW | Hospital Construction Shops |