diff --git a/shadowtube/history.py b/shadowtube/history.py
index a60141c..fbc2766 100644
--- a/shadowtube/history.py
+++ b/shadowtube/history.py
@@ -1 +1,18 @@
-"" 
+class History: #Abstract class
+    def __init__(self, filename):
+        self.history = list() 
+        
+    def __size__(self):
+        return len(history)
+        
+    def parse_history(self, filename):
+        return history
+
+    def is_this_type(self, filename): # bool function, 
+        return false                  # returns false if Youtube history
+
+    def get_video(self, index):
+        return history[index]
+
+    def __iter__(self):
+        return iter(history)