diff --git a/std/algorithm.hpp b/std/algorithm.hpp
index 3c4a036..7ec7845 100644
--- a/std/algorithm.hpp
+++ b/std/algorithm.hpp
@@ -5,3 +5,5 @@
 using std::equal;
 using std::min;
 using std::max;
+using std::transform;
+using std::equal_range;
diff --git a/std/array.hpp b/std/array.hpp
new file mode 100644
index 0000000..cdbd376
--- /dev/null
+++ b/std/array.hpp
@@ -0,0 +1,6 @@
+#pragma once
+
+#include <boost/array.hpp>
+
+template <class T, size_t N>
+inline size_t ArraySize(T (&) [N]) { return N; }
diff --git a/std/iterator.hpp b/std/iterator.hpp
new file mode 100644
index 0000000..5c98915
--- /dev/null
+++ b/std/iterator.hpp
@@ -0,0 +1,4 @@
+#pragma once
+
+#include <iterator>
+using std::back_inserter;
diff --git a/std/utility.hpp b/std/utility.hpp
index 9fff1d1..ff1b1a4 100644
--- a/std/utility.hpp
+++ b/std/utility.hpp
@@ -2,4 +2,5 @@
 
 #include <utility>
 
+using std::pair;
 using std::make_pair;