diff --git a/C/rainbow.c b/C/rainbow.c
index 9feca1e..309ffca 100644
--- a/C/rainbow.c
+++ b/C/rainbow.c
@@ -1,3 +1,7 @@
+/*
+ * This file contains the source of a program used to demonstrate BTUI's 24-bit
+ * color support by printing a rapidfire rainbow.
+ */
 #include <stdio.h>
 #include <math.h>
 #include "btui.h"
diff --git a/C/test.c b/C/test.c
index 2f5bdd6..0e79e51 100644
--- a/C/test.c
+++ b/C/test.c
@@ -1,3 +1,7 @@
+/*
+ * This file contains a basic example of BTUI C API usage.
+ */
+
 #include <stdio.h>
 #include "btui.h"
 
diff --git a/Lua/test.lua b/Lua/test.lua
index eb7f048..ff2b2cb 100644
--- a/Lua/test.lua
+++ b/Lua/test.lua
@@ -1,3 +1,7 @@
+#!/usr/bin/env lua
+--
+-- This file contains a basic example of BTUI Lua usage.
+--
 local btui = require("btui")
 
 btui(function(bt)
diff --git a/Python/test.py b/Python/test.py
index 0d6de17..1c4274d 100644
--- a/Python/test.py
+++ b/Python/test.py
@@ -1,3 +1,8 @@
+#!/usr/bin/env python3
+#
+# This file contains a simple test program for demonstrating some basic Python
+# BTUI usage.
+#
 from btui import open_btui
 
 with open_btui() as bt: