@@ Line 4: / Line 4: @@
 Need to use full links, otherwise this page gets into that category
  -or-
-[[:Category:Image processing|image processing]]
+* [[:Category:Image processing|image processing]]
-  ^                         ^
+  ^^^                         ^
 -->
 ==Difficulty==
@@ Line 19: / Line 20: @@
 * [http://rosettacode.org/wiki/Category:Data_Structures            Category:Data Structures]
 ** [http://rosettacode.org/wiki/Category:Basic_Data_Operations     Category:Basic Data Operations]
+* [[:Category:Memory_management]]
 ** [http://rosettacode.org/wiki/Category:Type_System               Category:Type System]
@@ Line 25: / Line 27: @@
 * [http://rosettacode.org/wiki/Category:Initialization       Category:Initialization]
+* [[:Category:Concurrency]]
 * [http://rosettacode.org/wiki/Category:Control_Structures         Category:Control Structures]
@@ Line 31: / Line 34: @@
 ** [http://rosettacode.org/wiki/Category:Recursion                Category:Recursion]
-* [[:Category:Functions and subroutines]]
+* [[:Category:Functions_and_subroutines]]
 * [http://rosettacode.org/wiki/Category:Input_Output               Category:Input Output]
+** [[:Category:Keyboard Input]]
 ** [http://rosettacode.org/wiki/Category:Hardware                  Category:Hardware]
 ** [http://rosettacode.org/wiki/Category:Sound                     Category:Sound]
@@ Line 88: / Line 93: @@
 * [http://rosettacode.org/wiki/Category:Mathematics             Category:Mathematics]
-** [[:Category:Arbitrary_Precision]]
+** [[:Category:Arbitrary_precision]]
 ** [[:Category:GMP]] - GNU Multiple Precision Arithmetic Library
 ** [[:Category:Constructive Solid Geometry]]