There are two base unit systems in the program which control the units (length, force, temperature, etc.) in which values — specifically results and other information presented in the tables and report— are displayed. The base unit system also dictates what type of default values the program uses when attributes such as Modulus of Elasticity, Density, etc., are assigned based on material types (i.e.., steel, Concrete, Aluminum) selected from the program’s library (Please refer to Built-In Material Constants). These two unit systems are English (Foot, Pound, etc.) and Metric (KN, Meter, etc.).