.he 'APPLY''- % -'
.fo 'Steven Hardy''January 78
APPLY	This function takes as argument a function, which it applies.
It could be defined as:
 	: FUNCTION APPLY(F); F() END;
 	: LAMBDA(F); ->F() END -> UPDATER(APPLY);
.br
Example:  if you wish to apply the function whose name is held in
the variable X do   APPLY(VALOF(X)).  This is not the same as
APPLY(X).  The latter is equivalent to APPLY(VALOF("X").
APPLY(L,HD), APPLY(L, VALOF("HD")), AND HD(L) are all equivalent.
In general it will be clearer to use the notation
 	: VALOF(X)()
.br
to apply the function whose name is stored in X.
