IRIS Software is a complete and comprehensive software package designed specifically for the IRIS family of ground penetrating radar systems. The primary software modules include Radar Data Acquisition (RDA), Radar Data Processing (RDP) and Radar Data Display (RDD) which manage data collection, data processing and display of GPR data, respectively. The RDA software features real-time data collection and display, and includes radar signal calibration, signal enhancement (preprocessing filters) and distance measurement (DMI) calibration functions. The RDP bridge and pavement analysis software consists of two major applications - BridgePro and PavePro. The BridgePro program analyzes IRIS GPR bridge deck data, measures the thickness of the overlay materials (asphalt and concrete cover), detects and identifies delaminations in concrete utilizing techniques developed under SHRP C-101 research. The PavePro program automatically identifies and computes the thickness of subsurface pavement layers. The RDD contains several useful display utilities to permit the examination and visual analysis of raw and processed radar data.