This report documents computer programs that can be used to create, update, and operate standard models designed to fit into ERS's World Grains, Oilseeds, and Livestock (GOL) model. The first part of the report outlines programs of TROLL commands which carry out tasks necessary to model development and operation. The second part of the report documents ways of creating sets of these TROLL commands using the mainframe or micro computer. To the extent that GOL component models have standard functional forms across commodities and countries, these groups of TROLL commands and parent programs greatly simplify GOL model management.