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diff --git a/StdLibPrivateInternalFiles/Include/Device/IIO.h b/StdLibPrivateInternalFiles/Include/Device/IIO.h
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+++ b/StdLibPrivateInternalFiles/Include/Device/IIO.h
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+/** @file
+  Constants and declarations for the Interactive IO library.
+
+  Copyright (c) 2012, Intel Corporation. All rights reserved.<BR>
+  This program and the accompanying materials are licensed and made available
+  under the terms and conditions of the BSD License which accompanies this
+  distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php.
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+#ifndef _INTERACTIVE_IO_H
+#define _INTERACTIVE_IO_H
+
+#include  <sys/EfiSysCall.h>
+#include  <sys/termios.h>
+#include  <Containers/Fifo.h>
+#include  <kfile.h>
+
+__BEGIN_DECLS
+
+typedef struct _IIO_Instance  cIIO;
+
+cIIO * EFIAPI New_cIIO(void);   // Creates a new cIIO structure
+
+/*  Types of Member functions of the TTY I/O "class". */
+typedef void    (EFIAPI *cIIO_Delete)    (cIIO *This);
+
+typedef ssize_t (EFIAPI *cIIO_Read)      (struct __filedes *filp, size_t BufferSize, VOID *Buffer);
+
+typedef ssize_t (EFIAPI *cIIO_Write)     (struct __filedes *filp, const char *buf, ssize_t n);
+
+typedef ssize_t (EFIAPI *cIIO_Echo)      (struct __filedes *filp, wchar_t EChar, BOOLEAN EchoIsOK);
+
+/** Structure defining an instance of the Interactive I/O "class".  **/
+struct _IIO_Instance {
+  /* ######## Public Functions ######## */
+  cIIO_Delete      Delete;
+  cIIO_Read        Read;
+  cIIO_Write       Write;
+  cIIO_Echo        Echo;
+
+  /* ######## PRIVATE Data ######## */
+
+  // Wide input buffer -- stdin
+  cFIFO          *InBuf;
+
+  // Wide output buffer -- stdout
+  cFIFO          *OutBuf;
+
+  // Attributes for characters in the output buffer
+  UINT8          *AttrBuf;
+
+  // Wide output buffer -- stderr
+  cFIFO          *ErrBuf;
+
+  // Character conversion states for the buffers
+  mbstate_t       OutState;
+  mbstate_t       ErrState;
+
+  //  Cursor position at beginning of operation
+  //  and at each character thereafter.
+  CURSOR_XY       InitialXY;
+  CURSOR_XY       CurrentXY;
+
+  UINTN           MaxColumn;    // Width of the output device
+  UINTN           MaxRow;       // Height of the output device
+
+  // termios structure
+  struct termios  Termio;
+};
+
+// Helper Functions
+ssize_t IIO_CanonRead     (struct __filedes *filp);
+ssize_t IIO_NonCanonRead  (struct __filedes *filp);
+ssize_t IIO_WriteOne      (struct __filedes *filp, cFIFO *Buf, wchar_t InCh);
+ssize_t IIO_EchoOne       (struct __filedes *filp, wchar_t InCh, BOOLEAN EchoIsOK);
+
+__END_DECLS
+#endif  /* _INTERACTIVE_IO_H */