PA0465 Console Scientific Calculator Program

                                                      
                                                      
   The currently supported constants for the free form
   expression evaluator are :                         
                                                      
           1) PI  =  3.141593                         
           2) E   =  2.718282                         
           3) C   =  2.997924 E 8   M/S               
           4) MP  =  1.672648 E -27 Kg                
           5) CE  =  1.602189 E -19 C                 
           6) H   =  6.626176 E -34 J/Hz              
           7) G   =  6.672    E -11 NM2/Kg2           
           8) M   =  1.256637 E -6  H/M