Western Data Systems is a Texas-based company that sells and rents global positioning systems. The company offers a variety of GPS systems for a number of different uses, including mapping products, such as TerraSync Software, Pathfinder Pro XRS, Recon Handheld, GeoXT Handheld, Pathfinder Office Software, GPS Pathfinder ProXH Receiver and GPS Pathfinder ProXT Receiver; survey products, including 5800 GPS Receiver, Trimble R8, Trimble 5700, Trimble R7, Trimble NetRS, Trimmark 3, TSCe Controller, 5600 Total Station and Trimble S6; construction instruments, such as interior construction lasers, exterior construction lasers, laser receivers, laser levels, grade lasers and construction positioning systems; machine control equipment, including BladePro, BladePro 3-D, Sitevision, GCS400 Grade Control System, ScreedPro, Trimble ATS and GL700 Grade Laser; and marine GPS systems. Western Data Systems is headquartered in Houston, with other locations in Dallas, San Antonio and Austin, Texas.