-The left hand side of the
-.I
-first
-.R
-grammar rule in the grammar rules section has special importance; it is taken to be the
-controlling nonterminal symbol for the entire input process;
-in technical language it is called the
-.I
-start symbol.
-.R
-In effect, the parser is designed to recognize the start symbol; thus,
-this symbol generally represents the largest,
+Of all the nonterminal symbols, one, called the
+.I "start symbol" ,
+has particular importance.
+The parser is designed to recognize the start symbol; thus,
+this symbol represents the largest,