Contents:
- Digital Peripherals Ltd
- Digital Scientific Corporation
- Digital Systems Ltd
- Dispersed Data Processing Ltd
- Diva Inc
- DLA Computer Services Ltd
- Dobbie McInnes (Electronics) Ltd
- Documation Ltd
- DP National Appliances Ltd
- DrillickLamanna Corporation
- Du Pont Information Services
- Dymo Ltd
- Dynamic Instrument Corporation
- Dynatech Laboratories Inc
- EcoComputer
- EH International Inc.
- Electrak Corporation
- Electrodata
- Electrographic
- Electrologica
- Electronic Associates Ltd
- Electronic Computer Corporation
- Electronic Memories & Magnetics Corp
- Electronic Services STC
- Elliott Bros. (London) Ltd
- Emerson Electric Industrial Controls Ltd
- EMI Electronics Ltd
- Energy Marine Co Ltd
- Engel & Gibbs Ltd