| Company name | Category |  | 
              
                | R and E | Analogue and mixed-signal ICs |  | 
              
                | R-Interface | Intellectual property cores |  | 
              
                | R2 Controls | PC-compatible boards, assemblies |  | 
              
                | R3 Technology | AC/DC power supplies |  | 
              
                | Rabbit Semiconductor | Embedded computing and control |  | 
              
                | Racal Instruments Wireless Solutions | Stand-alone instruments |  | 
              
                | RAD Data Communications | Networking hardware |  | 
              
                | Radiall | Plugs and sockets |  | 
              
                | Radicom Research | Networking hardware |  | 
              
                | Radio Data Technology | Wireless communications |  | 
              
                | Radioplan | Design and development software |  | 
              
                | Radioscape | Embedded software and operating systems |  | 
              
                | Radisys | Networking hardware |  | 
              
                | Radstone Embedded Computing | VMEbus boards, assemblies |  | 
              
                | RAIO Technology | Microprocessors, microcontrollers and DSPs |  | 
              
                | Rakon | Frequency control components |  | 
              
                | Ralink Technology | Communications ICs (wireless) |  | 
              
                | Rambus | Intellectual property cores |  | 
              
                | Ramtron | Memory devices and modules |  | 
              
                | Rapco Electronics | Stand-alone instruments |  | 
              
                | Rapid Conn | Cables and wires |  | 
              
                | Rapid Electronics | Light-emitting diodes (LEDs) |  | 
              
                | Rapid IO Trade Association | Recruitment, reports, resources |  | 
              
                | Raychem Circuit Protection | Circuit protection devices |  | 
              
                | Raycon Technology | PCB connectors |  | 
              
                | Raytheon Reliability Analysis Lab | Design and development software |  | 
              
                | Raza Microelectronics | Microprocessors, microcontrollers and DSPs |  | 
              
                | RBC Industries | Electronics manufacturing, packaging |  | 
              
                | RCD Components | Resistors |  | 
              
                | Reach Technology | LCD modules |  | 
              
                | Real Intent | Design and development software |  | 
              
                | Real Time Innovations | Design and development software |  | 
              
                | Real Time Logic | Embedded software and operating systems |  | 
              
                | Real-Time Systems | Embedded software and operating systems |  | 
              
                | Realtek Semiconductor | Communications ICs (wireless) |  | 
              
                | Recab Realtime Computers | VMEbus boards, assemblies |  | 
              
                | Recardis | Design and development software |  | 
              
                | Rechner | Sensors and data acquisition |  | 
              
                | Recom | DC/DC convertors |  | 
              
                | Rectron | Power-supply ICs and controllers |  | 
              
                | Recycling.co.uk | Electronics manufacturing services |  | 
              
                | Red Hat | Design and development software |  | 
              
                | Red Lion Controls | Other OEM display modules, meters |  | 
              
                | Redpine Signals | Communications ICs (wireless) |  | 
              
                | Reed Exhibitions | Exhibitions, courses, conferences, training |  | 
              
                | Regatron | Stand-alone instruments |  | 
              
                | Reliability Plus | Exhibitions, courses, conferences, training |  | 
              
                | Reliance Precision | Industry news |  | 
              
                | Remora Electrical | Enclosures and panel products |  | 
              
                | Remote Energy Monitoring | Other OEM display modules, meters |  | 
              
                | Remploy Electronics | Electronics manufacturing services |  | 
              
                | Renesas Technology | Microprocessors, microcontrollers and DSPs |  | 
              
                | REO | EMC components |  | 
              
                | Repic | Recruitment, reports, resources |  | 
              
                | Reprint | PCB assembly equipment, tools |  | 
              
                | Resource Efficiency Knowledge Transfer Network | Recruitment, reports, resources |  | 
              
                | Review Display Systems | LCD modules |  | 
              
                | Rexroth Electric Drives and Controls | DC/AC inverters |  | 
              
                | RF Digital | Wireless communications |  | 
              
                | RF Engines | Intellectual property cores |  | 
              
                | RF Industries | Plugs and sockets |  | 
              
                | RF Magic | Communications ICs (wireless) |  | 
              
                | RF Micro Devices | Communications ICs (wireless) |  | 
              
                | RF Monolithics | Wireless communications |  | 
              
                | RF Neulink | Wireless communications |  | 
              
                | RF Solutions | Wireless communications |  | 
              
                | RF Tune | Communications ICs (wired) |  | 
              
                | RFI Global Services | Compliance engineering |  | 
              
                | RFID Components | Wireless communications |  | 
              
                | RFID Networking Forum | Exhibitions, courses, conferences, training |  | 
              
                | RFIP Solutions | Wireless communications |  | 
              
                | RGB Lase | Lasers |  | 
              
                | Rhopoint Components | Resistors |  | 
              
                | RIA Connect | Terminals and power |  | 
              
                | Richco | Floor-standing racks, cabinets, enclosures |  | 
              
                | Ridgemount Technologies | Optical fibres, cables, connectors |  | 
              
                | Ridgerun | Design and development software |  | 
              
                | Riello UPS | UPSs |  | 
              
                | Rietschle Thomas | Electronics manufacturing, packaging |  | 
              
                | Rigel Medical | Stand-alone instruments |  | 
              
                | Riolab | Compliance engineering |  | 
              
                | RJS Electronics | Switches and keyboards |  | 
              
                | RNIB Scientific Research Unit | Recruitment, reports, resources |  | 
              
                | Road Warrior | Industry news |  | 
              
                | Roband Electronics | AC/DC power supplies |  | 
              
                | Robat | ATE systems |  | 
              
                | Robin Electronics | Stand-alone instruments |  | 
              
                | Rochester Electronics | Electronics manufacturing materials |  | 
              
                | Rockwell Automation | Floor-standing racks, cabinets, enclosures |  | 
              
                | Rococo Software | Design and development software |  | 
              
                | Rogers | Electronics manufacturing materials |  | 
              
                | Rohde and Schwarz | Compliance engineering |  | 
              
                | Rohm Semiconductor | Power-supply ICs and controllers |  | 
              
                | Rohswell | Recruitment, reports, resources |  | 
              
                | Ronetix | Design and development hardware |  | 
              
                | Rose Electronics | Networking hardware |  | 
              
                | Rotek Instrument | Stand-alone instruments |  | 
              
                | Round Solutions | Wireless communications |  | 
              
                | Rowe Hankins Components | Circuit protection devices |  | 
              
                | Rowland Automation | Switches and keyboards |  | 
              
                | Royal National Institute for Deaf People | Recruitment, reports, resources |  | 
              
                | Royce Instruments | Electronics manufacturing materials |  | 
              
                | RPM Systems | Design and development hardware |  | 
              
                | RS Components | Capacitors |  | 
              
                | RTX Telecom | Design and development software |  | 
              
                | Rubycon | Capacitors |  | 
              
                | Rugged Technologies | PC-compatible boards, assemblies |  | 
              
                | Rutronik Elektronische Bauelemente | Microprocessors, microcontrollers and DSPs |  |