=item *
The U/WIN environment for Win32,
-<http://www.research.att.com/sw/tools/uwin/
+http://www.research.att.com/sw/tools/uwin/
-=item Build instructions for OS/2, L<perlos2>
+=item *
+Build instructions for OS/2, L<perlos2>
=back
Not implemented. (S<Mac OS>, Win32, VMS, S<RISC OS>, VOS)
+=item sockatmark SOCKET
+
+A relatively recent addition to socket functions, may not
+be implemented even in UNIX platforms.
+
=item socketpair SOCKET1,SOCKET2,DOMAIN,TYPE,PROTOCOL
Not implemented. (S<Mac OS>, Win32, VMS, S<RISC OS>, VOS, VM/ESA)