Trimble Terramodel 10.6.zip [work] -

Create detailed roadway designs, generate digital terrain models (DTM), and produce automatic contours. Visualization: Features an integrated 3D Visualizer for quality control and interactive project viewing. Customization: TML (Terramodel Macro Language)

The .zip file typically contains the core installer and various "Updates" (such as 10.61G or 10.61P) that fix bugs and add functionality. Terramodel - Geocomp Systems trimble terramodel 10.6.zip

A few important points: