diff --git a/development/libs/iterator/iterator_concepts.fig b/development/libs/iterator/iterator_concepts.fig
new file mode 100644
index 0000000..3c51b23
--- /dev/null
+++ b/development/libs/iterator/iterator_concepts.fig
@@ -0,0 +1,37 @@
+#FIG 3.2
+Landscape
+Center
+Inches
+Letter  
+100.00
+Single
+-2
+1200 2
+6 825 1575 3825 4500
+2 1 0 1 0 7 100 0 -1 4.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 120.00
+	 1725 2400 1725 1800
+2 1 0 1 0 7 100 0 -1 4.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 120.00
+	 1725 4200 1725 3600
+2 1 0 1 0 7 100 0 -1 4.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 120.00
+	 1725 3300 1725 2700
+4 0 0 100 0 19 18 0.0000 4 255 2370 825 1800 SinglePassIterator\001
+4 0 0 100 0 19 18 0.0000 4 195 1995 825 2700 ForwardIterator\001
+4 0 0 100 0 19 18 0.0000 4 195 2565 825 3600 BidirectionalIterator\001
+4 0 0 100 0 19 18 0.0000 4 195 2955 825 4500 RandomAccessIterator\001
+-6
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 120.00
+	 4800 3600 4800 2400
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 120.00
+	 6900 3000 5400 2400
+2 1 0 1 0 7 50 0 -1 0.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 120.00
+	 6900 3000 7500 2400
+4 0 0 100 0 19 18 0.0000 4 195 1995 6600 2400 WritableIterator\001
+4 0 0 100 0 19 18 0.0000 4 195 2130 3900 2400 ReadableIterator\001
+4 0 0 50 0 19 18 0.0000 4 195 2805 5700 3300 MutableLvalueIterator\001
+4 0 0 50 0 19 18 0.0000 4 195 2955 3900 3900 ConstantLvalueIterator\001