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diff --git a/ACE/ace/Pair_T.h b/ACE/ace/Pair_T.h
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+/* -*- C++ -*- */
+
+//=============================================================================
+/**
+ *  @file    Pair_T.h
+ *
+ *  $Id$
+ *
+ *  @author Irfan Pyarali <irfan@cs.wustl.edu>
+ */
+//=============================================================================
+
+
+#ifndef ACE_PAIR_T_H
+#define ACE_PAIR_T_H
+#include /**/ "ace/pre.h"
+
+#include "ace/config-all.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+ACE_BEGIN_VERSIONED_NAMESPACE_DECL
+
+/**
+ * @class ACE_Pair
+ *
+ * @brief Defines a pair.
+ *
+ * Similar to the STL pair.
+ */
+template <class T1, class T2>
+class ACE_Pair
+{
+public:
+
+  // = Traits.
+  typedef T1 first_type;
+  typedef T2 second_type;
+
+  // = Initialization and termination methods.
+  /// Constructor.
+  ACE_Pair (const T1 &t1,
+            const T2 &t2);
+
+  /// Default constructor.
+  ACE_Pair (void);
+
+  /// Get first.
+  T1 &first (void);
+  const T1 &first (void) const;
+
+  /// Set first.
+  void first (const T1 &t1);
+
+  /// Get second.
+  T2 &second (void);
+  const T2 &second (void) const;
+
+  /// Set second.
+  void second (const T2 &t2);
+
+  // Compare pairs.
+  bool operator== (const ACE_Pair<T1, T2> &rhs) const;
+
+protected:
+  /// First.
+  T1 first_;
+
+  /// Second.
+  T2 second_;
+};
+
+/**
+ * @class ACE_Reference_Pair
+ *
+ * @brief Defines a pair that only hold references.
+ *
+ * Similar to the STL pair (but restricted to holding references
+ * and not copies).
+ */
+template <class T1, class T2>
+class ACE_Reference_Pair
+{
+public:
+
+  // = Traits.
+  typedef T1 first_type;
+  typedef T2 second_type;
+
+  // = Initialization and termination methods.
+  /// Constructor.
+  ACE_Reference_Pair (T1 &t1,
+                      T2 &t2);
+
+  /// Access first.
+  T1 &first (void) const;
+
+  /// Access second.
+  T2 &second (void) const;
+
+  // Compare pairs.
+  bool operator== (const ACE_Reference_Pair<T1, T2> &rhs) const;
+
+protected:
+  /// First.
+  T1 &first_;
+
+  /// Second.
+  T2 &second_;
+};
+
+ACE_END_VERSIONED_NAMESPACE_DECL
+
+#if defined (__ACE_INLINE__)
+#include "ace/Pair_T.inl"
+#endif /* __ACE_INLINE__ */
+
+#if defined (ACE_TEMPLATES_REQUIRE_SOURCE)
+#include "ace/Pair_T.cpp"
+#endif /* ACE_TEMPLATES_REQUIRE_SOURCE */
+
+#if defined (ACE_TEMPLATES_REQUIRE_PRAGMA)
+#pragma implementation ("Pair_T.cpp")
+#endif /* ACE_TEMPLATES_REQUIRE_PRAGMA */
+
+#include /**/ "ace/post.h"
+#endif /* ACE_PAIR_T_H */