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diff --git a/pod/perliol.pod b/pod/perliol.pod
index 26ad305..a560d97 100644
--- a/pod/perliol.pod
+++ b/pod/perliol.pod
@@ -22,7 +22,7 @@ maintain (source) compatibility.
 
 The aim of the implementation is to provide the PerlIO API in a flexible
 and platform neutral manner. It is also a trial of an "Object Oriented
-C, with vtables" approach which may be applied to perl6.
+C, with vtables" approach which may be applied to Perl 6.
 
 =head2 Basic Structure
 
@@ -145,7 +145,7 @@ same as the public C<PerlIO_xxxxx> functions:
    IV		(*Pushed)(pTHX_ PerlIO *f,const char *mode,SV *arg, PerlIO_funcs *tab);
    IV		(*Popped)(pTHX_ PerlIO *f);
    PerlIO *	(*Open)(pTHX_ PerlIO_funcs *tab,
-  			AV *layers, IV n,
+  			PerlIO_list_t *layers, IV n,
   			const char *mode,
   			int fd, int imode, int perm,
   			PerlIO *old,
@@ -246,7 +246,7 @@ representing open (allocated) handles. For example the first three slots
 in the table correspond to C<stdin>,C<stdout> and C<stderr>. The table
 in turn points to the current "top" layer for the handle - in this case
 an instance of the generic buffering layer "perlio". That layer in turn
-points to the next layer down - in this case the lowlevel "unix" layer.
+points to the next layer down - in this case the low-level "unix" layer.
 
 The above is roughly equivalent to a "stdio" buffered stream, but with
 much more flexibility:
@@ -486,7 +486,7 @@ C<PerlIO_fdopen> and C<PerlIO_reopen>.  The full prototype is as
 follows:
 
  PerlIO *	(*Open)(pTHX_ PerlIO_funcs *tab,
-			AV *layers, IV n,
+			PerlIO_list_t *layers, IV n,
 			const char *mode,
 			int fd, int imode, int perm,
 			PerlIO *old,
@@ -494,7 +494,7 @@ follows:
 
 Open should (perhaps indirectly) call C<PerlIO_allocate()> to allocate
 a slot in the table and associate it with the layers information for
-the opened file, by calling C<PerlIO_push>.  The I<layers> AV is an
+the opened file, by calling C<PerlIO_push>.  The I<layers> is an
 array of all the layers destined for the C<PerlIO *>, and any
 arguments passed to them, I<n> is the index into that array of the
 layer being called. The macro C<PerlIOArg> will return a (possibly