====== Other: Input ======  
                                                                              
  When you enter commands, they are  first  processed  by  a  utility  that   
  enables history, aliases, and other features.                               
                                                                              
  For help on aliasing, see "help alias", also see "help history".            
                                                                              
  Here is a list of other features:                                           
                                                                              
  Command issued           Effect.                                            
  ^sub^stit                The string "sub" is replaced by "stit" in the      
                           previous command, then executed.                   
  <cmd>\                   <cmd> is stored, and appended with the next        
                           command issued. Unless the environmental           
                           variable "no_build" is set.                        
  ~?                       Print help in command building mode.               
  %%                       Repeat previous command.                           
  %<num>                  Repeat <num>'th last command.                      
  %<num>                   Repeat <num>'th command in history list.           
  %<num>^sub^stit          History substitution.                              
  %<string>                Repeat last command beginning with <string>.       
                           (See "help history").