| ID | Name | Type |
|---|---|---|
| #17237 | Dukes Marketing (Dukes Mail Order) | A |
| #19614 | Duncan Anderson | + |
| #4043 | Duncan Bowen School | Z |
| #4044 | Duncan Campbell | + |
| #21219 | Duncan Evans | + |
| #4045 | Duncan Games | Z |
| #4046 | Duncan Howard | + |
| #4047 | Duncan J. Munro | + |
| #17985 | Duncan Kershaw | + |
| #4048 | Duncan Kinnaird | + |
| #22738 | Duncan Larkman | + |
| #4049 | Duncan MacDonald | + |
| #4050 | Duncan Nightingale | + |
| #4051 | Duncan Overton | + |
| #4052 | Duncan Sinclair | + |
| #4053 | Dunitz Software | Z |
| #4054 | Dunkley | ? |
| #18077 | Dunny | - |
| #4056 | Duo Soft | Z |
| #4057 | Duplinter S.A. | Z |