Quartix Vehicle tracking systems based on GPS, Internet and GSM technology. http://www.quartix.net

Radioactive Networks Supplier of GPS tracking hardware and software. Has expertise in wireless communications networks. http://www.radio-active.net.au

RCN-Conti Vehicle tracking and fleet management solutions using GSM/GPS and satellite technology. http://www.rcn-conti.lv

Remote Knowledge Development and sales of vehicle tracking devices with interactive communications to monitor equipment performance and for theft intervention or recovery. http://www.rkiq.com

Retego Solutions Limited Web-based messaging and location systems for UK fleet management applications. http://www.retego.co.uk

RJI Inc. Automatic vehicle and mobile asset location system. http://rji.cc/

Roadeye GPS-based vehicle tracking and security system, providing real-time tracking on street level mapping and mobile phone alerts with desktop PC software. http://www.roadeye.co.uk

Rosum Corporation Mobile positioning technology will initially be used to locate cellular phones. http://www.rosum.com

SafeParents GPS tracking of teenage drivers for concerned parents. http://www.safeparents.com/

Safety Track of Michigan GPS tracking designed for a wide range of applications, including consumer, commercial, municipal, mass transit, law enforcement and public safety. http://www.safetytrackofmichigan.com

Satamatics Inmarsat D+ Satellite network operator, provider of terminals and applications for GPS tracking, remote monitoring and control of mobile and fixed assets via the Internet. http://www.satamatics.com

Saturn Technologies The SENTRY product ensure that communication costs between base and mobile asset remains efficient and cost effective. http://www.saturn-technologies.com

SecTrack Logistical fleet management solution provider based on Inmarsat D+, Mini C or terrestrial systems. http://www.sectrackglobal.com/

Secugis Hitech Corp Designs, manufactures and markets GPS equipment,GIS system, data logging and simulation software products. http://www.secugis-gps.com

Securefleet Notifier fleet management systems combines GPS technology and nationwide wireless data networks in USA. Track the location and condition of multiple vehicles in a fleet. http://www.securefleet.com

Shield-it PathFinder Vehicle Tracking System, AVL tracking system based on the GPS technology to protect and secure cars, lorries or any form of vehicle. http://www.shield-it.co.uk

Simrex Corporation Aria-GLB products manufacturer offering products for automatic vehicle location, mobile data, railroads, mining, taxis, aircraft, telemetry, robotics, and public safety applications. http://www.aria-glb.com/

SkyBitz Tracking and communications services based on Global Locating System (GLS) technology. http://www.skybitz.com/

Skyreach Vehicle tracking systems specializing in fleet tracking, driver log, and log haul solutions. http://www.goskyreach.com

Skytrac Systems Automatic flight following, two-way text messaging and voice capable systems for both fixed and rotary wing aircraft. http://www.skytrac.ca