County Index - Somerset
- Acc Silicones Ltd - Somerset - Bridgwater
- Aerosystems International Ltd. - Somerset - Yeovil
- ALS Technologies Ltd - Somerset - Wincanton
- AP Technologies Ltd. - Somerset - Bath
- Avalon Electronics Ltd. - Somerset - Shepton Mallet
- Bridgwater Electronics - Somerset - Burnham on Sea
- Brightworks Ltd - Somerset - Cheddar
- Cabletec ICS Ltd - Somerset - Weston super Mare
- Coltraco Ltd - Somerset - Radstock
- Conferex Communications - Somerset - Axbridge
- Coomber Security Systems Ltd. - Somerset - Taunton
- Creasefield Ltd - Somerset - Ilminster
- Custom Labels Ltd - Somerset - Bridgwater
- Data and Power Solutions Ltd - Somerset - Taunton
- Data Encryption Systems Ltd. - Somerset - Taunton
- Edenfield Communications Ltd - Somerset - Bath
- EMR International Ltd - Somerset - Weston super Mare
- Epak Electronics Ltd - Somerset - Chard
- Euroquartz Ltd - Somerset - Crewkerne
- Exa Thermometrics Europe - Somerset - Weston super Mare
- Frequency Products Ltd - Somerset - Crewkerne
- Ge Thermometrics - Somerset - Taunton
- Global Engineering Services - Somerset - Wellington
- Golledge Electronics Ltd. - Somerset - Ilminster
- Great Circle Design - Somerset - Wincanton
- Gss Avionics Ltd. - Somerset - Yeovil
- Honeywell Aerospace Uk - Somerset - Yeovil
- IEWC UK and Ireland Ltd - Somerset - Weston super Mare
- Integrated Document Solutions (IDS) - Somerset - Taunton
- Limab UK Ltd - Somerset - Wellington
- Line Scan Ltd - a division Universal Eng Co Ltd - Somerset - Yeovil
- Lippeatts Ltd. - Somerset - Glastonbury
- Lockwell Electrical Distributors Ltd - Somerset - Frome
- M.K. Test Systems Ltd. - Somerset - Wellington
- Marsden Smith Ltd - Somerset - Weston super Mare
- Meiji Techno U K Ltd. - Somerset - Axbridge
- MF Public Address Systems - Somerset - Cheddar
- Micron Communications Ltd - Somerset - Yeovil
- Multi-Security Services - Somerset - Weston super Mare
- Norset Office Supplies Ltd. - Somerset - Cheddar
- Onyx Holdings Ltd - Somerset - South Petherton
- PMBL Ltd - Somerset - Chard
- Precision Applications Ltd. - Somerset - Wells
- Radio Comms Co - Somerset - Highbridge
- Ringway Signs Ltd - Somerset - Weston super Mare
- Rotalink Ltd - Somerset - Crewkerne
- Scantron Industrial Products Ltd - Somerset - Taunton
- Sierra Integrated Systems Ltd - Somerset - Yeovil
- Sirus Microtech Ltd. - Somerset - Wellington
- Solutions Audio Visual Ltd. - Somerset - Langport
- Somerdata Ltd. - Somerset - Wells
- Sumida Components and Modules GmbH (Formerly VOGT Electronic Components GmbH) - Somerset - Highbridge
- Tate Colson - Somerset - Cheddar
- Teklagraf - Somerset - Weston super Mare
- Thales Defence Ltd - Somerset - Wells
- Thales Underwater Systems Ltd - Somerset - Templecombe
- Tunnel Management Systems Ltd. - Somerset - Taunton
- Webster Electronics Ltd - Somerset - Crewkerne
- Westland Helicopters Ltd. - Somerset - Yeovil
- Winsom Electronics Ltd. - Somerset - Wincanton
- Yeovil Circuits Ltd. - Somerset - Yeovil