1 4 51   Model menu  
   This is a list of available physical models.
Select a model for further work.
   The 'QED', '4-fermion' and 'Standard Model' are 
built-in models. The Standard Model is available in 
two gauges, the unitary (physical) gauge and the 
't Hooft-Feynman gauge. We recommend to use the 
't Hooft-Feynman gauge for complicated calculations.
   New models can be created with the help of the 
"CREATE NEW MODEL" menu function. The first character 
of the new model name is always the underscore symbol '_'.
  The user has a possibility to change the contents of
any model. The original version of any built-in model
can be restored.