In this video, the basic operations of OpenModelica are presented: (1) what are the four layers of function: Welcome, Modeling, Plotting, Debugging. (2) What are the four representations of models: Icon, Diagram, Text View, and documentation.. (3) How to check you models (4) How to simulate your models (5) What are the common Modelica libraries (6) How to load your own model (7) How to design your icon for your model. (8) How to do simulation setup: start-time, stop-time, linear-solver, non-linear-solver.