These are a group of commands that control and configure program execution. The data associated with program commands are generally not saved at all, or are saved in the registry of the computer running the program, to be available the next time the program is run. However, the data are not associated with any specific project or model state. All program commands may be formed with or without the leading word program — the commands forms program.quit and quit will achieve the same result. These commands differ from the model commands where the results usually impact the model state.