Here is the Civilian Research tree playing TEC. Every race have its own research tree and there are 5 research fields. Civilian tree allow different planet types colonization, resources and credit income and culture spread and resistance. Also it is important to discover the com sat, which worn when enemies are heading to our planets. Military tree allow ship construction, weapons and armor. Defense tree is for defense structures and star bases. Fleet Logistics increase the number of capital ships and fleet size. And Diplomacy tree gives some diplomatic actions with other races.