diff --git a/SLS_Python/sls_calc/__main__.py b/SLS_Python/sls_calc/__main__.py
index 8105afe..d1a29b7 100644
--- a/SLS_Python/sls_calc/__main__.py
+++ b/SLS_Python/sls_calc/__main__.py
@@ -8,10 +8,10 @@ import tkinter as tk
 from tkinter import ttk, font as tkfont
 import sls_py
 
-class HPCalculator:
+class SlsCalculator:
     def __init__(self, root):
         self.root = root
-        self.root.title("HP Stack Calculator")
+        self.root.title("SLS Calculator")
         # self.root.geometry("450x650")
         self.root.resizable(False, False)
         
@@ -30,9 +30,8 @@ class HPCalculator:
         """Create all calculator widgets"""
         # Main container
         main_frame = ttk.Frame(self.root, padding="10")
-        main_frame.grid(row=0, column=0, sticky=(tk.W, tk.E, tk.N, tk.S))
+        main_frame.grid(row=0, column=0, sticky=(tk.W, tk.E, tk.N, tk.S)) # type: ignore
         
-        # Stack display (shows 4 stack levels like classic HP)
         self.create_stack_display(main_frame)
         
         # Entry display
@@ -44,27 +43,27 @@ class HPCalculator:
     def create_stack_display(self, parent):
         """Create the 4-level stack display"""
         stack_frame = ttk.LabelFrame(parent, text="Stack", padding="5")
-        stack_frame.grid(row=0, column=0, columnspan=4, sticky=(tk.W, tk.E), pady=(0, 10))
+        stack_frame.grid(row=0, column=0, columnspan=4, sticky=(tk.W, tk.E), pady=(0, 10)) # type: ignore
         
         self.stack_labels = []
         for i in range(4):
             label = ttk.Label(stack_frame,
-                            text=f"T{3-i}: <>",
+                            text=f"{3-i}:",
                             anchor='e',
                             width=30)
-            label.grid(row=i, column=0, sticky=(tk.W, tk.E), pady=2)
+            label.grid(row=i, column=0, sticky=(tk.W, tk.E), pady=2) # type: ignore
             self.stack_labels.append(label)
             
     def create_entry_display(self, parent):
         """Create the current entry display"""
         entry_frame = ttk.Frame(parent)
-        entry_frame.grid(row=1, column=0, columnspan=4, sticky=(tk.W, tk.E), pady=(0, 10))
+        entry_frame.grid(row=1, column=0, columnspan=4, sticky=(tk.W, tk.E), pady=(0, 10)) # type: ignore
         
         self.entry_label = ttk.Label(entry_frame,
                                     text="0",
                                     anchor='e',
                                     font=('Courier', 16))
-        self.entry_label.grid(row=0, column=0, sticky=(tk.W, tk.E))
+        self.entry_label.grid(row=0, column=0, sticky=(tk.W, tk.E)) # type: ignore
         
     def create_button_grid(self, parent):
         """Create the calculator button grid"""
@@ -84,7 +83,7 @@ class HPCalculator:
                                     text=text,
                                     command=command,
                                     width=8)
-                    btn.grid(row=row_idx, column=col_idx, padx=2, pady=2, sticky=(tk.W, tk.E, tk.N, tk.S))
+                    btn.grid(row=row_idx, column=col_idx, padx=2, pady=2, sticky=(tk.W, tk.E, tk.N, tk.S)) # type: ignore
         
         # Keyboard bindings
         self.root.bind('<Delete>', lambda e: self.drop())
@@ -230,9 +229,9 @@ class HPCalculator:
             if stack_size > level:
                 entry = self.interp.stack[-(level + 1)]
                 value_str = self.format_stack_entry(entry)
-                self.stack_labels[i].config(text=f"T{level}: {value_str}")
+                self.stack_labels[i].config(text=f"{level}: {value_str}")
             else:
-                self.stack_labels[i].config(text=f"T{level}: <>")
+                self.stack_labels[i].config(text=f"{level}:")
                 
     def format_stack_entry(self, entry):
         """Format a stack entry for display"""
@@ -255,7 +254,7 @@ class HPCalculator:
 
 def main():
     root = tk.Tk()
-    app = HPCalculator(root)
+    app = SlsCalculator(root)
     root.mainloop()