Private insurers offer a variety of supplemental coverages in both the group and individual markets. WCS uses the coverage model of the OGC GML Application Schema for Coverages. Mercury provides liability, comprehensive, collision, and other coverages for personal automobiles. ACE Bermuda provides liability, property, political risk coverages and captive programs through large international brokers. The renter often has a choice among different coverages for different fees. Standard property coverages typically exclude perils of mechanical and electrical breakdown. It allows defenses more flexibility in man to man coverages and zone blitzes. ACE Private Risk Services offers high-value personal lines coverages through independent agents and brokers. ACE Agriculture offers crop, farm and agribusiness P&C coverages through agents and brokers. QGIS supports shapefiles, coverages, personal geodatabases, dxf, MapInfo, PostGIS, and other formats. RLI also provides select coverages through independent agents. The station also covered important news coverages during the 70s and the 80s. ArcInfo Workstation handled coverages, which stored topology information about the spatial data. The ESRI ArcInfo coverages and personal/file/enterprise geodatabases do have the ability to store feature topology. This segment is engaged in providing custom designed coverages.