diff --git a/source/handyarraylist.h b/source/handyarraylist.h
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+++ b/source/handyarraylist.h
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+/*
+handyarraylist.h
+Created By:
+    Andrew Lalis (andrewlalisofficial@gmail.com)
+    16 October 2017
+This file is free to use, as long as the above comment remains in the file.
+Please contact the author regarding bugs and/or feature requests.
+*/
+
+#ifdef ARRAYLIST_TYPE
+
+#include "templates.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+/*
+Array List:
+    The array list is a type of list in which a continuous block of data
+    is used as the array, and items are added and removed, and the list
+    should remain intact, and one contiguous segment of memory.
+*/
+
+/*
+ArrayList Constants:
+*/
+#ifndef ARRAYLIST_SIZE_DEFAULT
+#define ARRAYLIST_SIZE_DEFAULT 64
+#endif
+
+/*
+ARRAYLIST: the array list type for a specific arraylist.
+*/
+#define ARRAYLIST TEMPLATE(ARRAYLIST_TYPE,arraylist)
+
+/*
+Array List structure:
+    Each array list contains an array of data, as well as a front, back,
+    and size parameters.
+*/
+typedef struct {
+    ARRAYLIST_TYPE* data;
+    int size;//The size of the data array, not number of elements.
+    int length;//The number of elements in the array.
+} ARRAYLIST;
+
+#endif