diff --git a/index.wiki b/index.wiki
index 906ca6b..717b540 100644
--- a/index.wiki
+++ b/index.wiki
@@ -41,6 +41,7 @@ _Ideas.md and Classes.md are encrypted, so these links will not work_
 * [[lang/Rust|Rust]]
 * [[lang/Go|Go]]
 * [[lang/sql|SQL]]
+* [[lang/HDL|HDL]]
 
 == [[sci/index|Science]] ==
 
diff --git a/lang/HDL.wiki b/lang/HDL.wiki
new file mode 100644
index 0000000..b0d59a4
--- /dev/null
+++ b/lang/HDL.wiki
@@ -0,0 +1,6 @@
+= HDL =
+
+HDL or Hardware Description Language is a language for 'programing' logic gates
+for digital electronics.
+
+