Contents:
- Dataspeed
- Datatype Terminals
- Datel Coms Ltd
- Datum Inc
- Decca Radar Ltd
- Decision Data Computer Corp
- De Havilland Data Centre
- Delpa Systems (UK) Ltd
- Delta Data Systems
- Dentron Computers Ltd
- Diablo Systems Inc
- Dicoll Electronics
- Dicomed Corporation
- Diehl
- Digico Ltd
- DigiData Ltd
- Digital Equipment (DEC)