diff --git a/LinearList/arrayList.cpp b/LinearList/as-Array/arrayList.cpp
similarity index 100%
rename from LinearList/arrayList.cpp
rename to LinearList/as-Array/arrayList.cpp
diff --git a/LinearList/arrayList.h b/LinearList/as-Array/arrayList.h
similarity index 100%
rename from LinearList/arrayList.h
rename to LinearList/as-Array/arrayList.h
diff --git a/LinearList/linearList.h b/LinearList/as-Array/linearList.h
similarity index 100%
rename from LinearList/linearList.h
rename to LinearList/as-Array/linearList.h
diff --git a/LinearList/main.cpp b/LinearList/as-Array/main.cpp
similarity index 100%
rename from LinearList/main.cpp
rename to LinearList/as-Array/main.cpp
diff --git a/LinearList/as-List/linearList.h b/LinearList/as-List/linearList.h
new file mode 100644
index 0000000..bb4c726
--- /dev/null
+++ b/LinearList/as-List/linearList.h
@@ -0,0 +1,20 @@
+#ifndef LINEAR_LIST
+#define LINEAR_LIST
+#include <iostream>
+
+template <typename T>
+class linearList {
+public:
+	virtual ~linearList() {};
+	virtual bool empty() const = 0; //If empty, return 0;
+	virtual int size() const = 0; //Return Array Size
+	virtual T& get(int theIndex) const = 0; // Return Arr[theIndex]
+	virtual int indexOf(const T& theElement) const = 0; //Return the index of "theElement" first appeared
+	virtual void erase(int theIndex) = 0; //Erase Arr[theIndex] 
+	virtual T* changeLength(T* x, int oldlength, int newlength) = 0;
+	virtual void insert(int theIndex, const T& theElement) = 0; //Insert theElement to place Arr[theIndex]
+	virtual void output() const = 0; //cout		
+};
+
+
+#endif
\ No newline at end of file