diff --git a/contributions/Calculator b/contributions/Calculator
new file mode 100644
index 0000000..5d899ca
--- /dev/null
+++ b/contributions/Calculator
@@ -0,0 +1,374 @@
+import tkinter  
+from tkinter import *  
+from tkinter import messagebox  
+  
+var = ""  
+A = 0  
+operator = ""  
+  
+def button_1_is_Clicked():  
+    global var  
+    var = var + "1"  
+    the_data.set(var)  
+  
+def button_2_is_Clicked():  
+    global var  
+    var = var + "2"  
+    the_data.set(var)  
+  
+def button_3_is_Clicked():  
+    global var  
+    var = var + "3"  
+    the_data.set(var)  
+  
+def button_4_is_Clicked():  
+    global var  
+    var = var + "4"  
+    the_data.set(var)  
+  
+def button_5_is_Clicked():  
+    global var  
+    var = var + "5"  
+    the_data.set(var)  
+  
+def button_6_is_Clicked():  
+    global var  
+    var = var + "6"  
+    the_data.set(var)  
+  
+def button_7_is_Clicked():  
+    global var  
+    var = var + "7"  
+    the_data.set(var)  
+  
+def button_8_is_Clicked():  
+    global var  
+    var = var + "8"  
+    the_data.set(var)  
+  
+def button_9_is_Clicked():  
+    global var  
+    var = var + "9"  
+    the_data.set(var)  
+  
+def button_0_is_Clicked():  
+    global var  
+    var = var + "0"  
+    the_data.set(var)  
+  
+def button_Add_is_Clicked():  
+    global A  
+    global var  
+    global operator  
+    A = float(var)  
+    operator = "+"  
+    var = var + "+"  
+    the_data.set(var)  
+  
+def button_Sub_is_Clicked():  
+    global A  
+    global var  
+    global operator  
+    A = float(var)  
+    operator = "-"  
+    var = var + "-"  
+    the_data.set(var)  
+  
+def button_Mul_is_Clicked():  
+    global A  
+    global var  
+    global operator  
+    A = float(var)  
+    operator = "*"  
+    var = var + "*"  
+    the_data.set(var)  
+  
+def button_Div_is_Clicked():  
+    global A  
+    global var  
+    global operator  
+    A = float(var)  
+    operator = "/"  
+    var = var + "/"  
+    the_data.set(var)  
+  
+def button_Equal_is_Clicked():  
+    global A  
+    global var  
+    global operator  
+    A = float(var)  
+    operator = "="  
+    var = var + "="  
+    the_data.set(var)  
+  
+def button_C_is_Clicked():  
+    global A  
+    global var  
+    global operator  
+    var = ""  
+    A = 0  
+    operator = ""  
+    the_data.set(var)  
+  
+def res():  
+    global A  
+    global operator  
+    global var  
+    var2 = var  
+    if operator == "+":  
+        a = float((var2.split("+")[1]))  
+        x = A + a  
+        the_data.set(x)  
+        var = str(x)  
+    elif operator == "-":  
+        a = float((var2.split("-")[1]))  
+        x = A - a  
+        the_data.set(x)  
+        var = str(x)  
+    elif operator == "*":  
+        a = float((var2.split("*")[1]))  
+        x = A * a  
+        the_data.set(x)  
+        var = str(x)  
+    elif operator == "/":  
+        a = float((var2.split("/")[1]))  
+        if a == 0:  
+            messagebox.showerror("Division by 0 Not Allowed.")  
+            A == ""  
+            var = ""  
+            the_data.set(var)  
+        else:  
+            x = float(A/a)  
+            the_data.set(x)  
+            var = str(x)  
+  
+guiWindow = tkinter.Tk()  
+guiWindow.geometry("320x400+400+400")  
+guiWindow.resizable(0, 0)  
+guiWindow.title("PanCalc")  
+  
+the_data = StringVar()  
+guiLabel = Label(  
+    guiWindow,  
+    text = "Label",  
+    anchor = SE,  
+    font = ("Cambria Math", 20),  
+    textvariable = the_data,  
+    background = "#000000",  
+    fg = "#ffffff"  
+)  
+guiLabel.pack(expand = True, fill = "both")  
+  
+frameOne = Frame(guiWindow, bg = "#ffffff")  
+frameOne.pack(expand = True, fill = "both") 
+
+frameTwo = Frame(guiWindow, bg = "#ffffff")  
+frameTwo.pack(expand = True, fill = "both")  
+  
+# third frame  
+frameThree = Frame(guiWindow, bg = "#ffffff")  
+frameThree.pack(expand = True, fill = "both")  
+  
+# fourth frame  
+frameFour = Frame(guiWindow, bg = "#ffffff")  
+frameFour.pack(expand = True, fill = "both")  
+  
+# creating buttons for each frame  
+# buttons for first frame  
+# button 1  
+buttonONE = Button(  
+    frameOne,  
+    text = "1",  
+    font = ("Cambria", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_1_is_Clicked  
+)  
+# placing buttons side by side  
+buttonONE.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button 2  
+buttonTWO = Button(  
+    frameOne,  
+    text = "2",  
+    font = ("Cambria", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_2_is_Clicked  
+)  
+# placing buttons side by side  
+buttonTWO.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button 3  
+buttonTHREE = Button(  
+    frameOne,  
+    text = "3",  
+    font = ("Cambria", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_3_is_Clicked  
+)  
+# placing buttons side by side  
+buttonTHREE.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button C  
+buttonC = Button(  
+    frameOne,  
+    text = "C",  
+    font = ("Cambria", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_C_is_Clicked  
+)  
+# placing buttons side by side  
+buttonC.pack(side = LEFT, expand = True, fill = "both")  
+  
+# buttons for second frame  
+# button 4  
+buttonFOUR = Button(  
+    frameTwo,  
+    text = "4",  
+    font = ("Cambria", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_4_is_Clicked  
+)  
+# placing buttons side by side  
+buttonFOUR.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button 5  
+buttonFIVE = Button(  
+    frameTwo,  
+    text = "5",  
+    font = ("Cambria", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_5_is_Clicked  
+)  
+# placing buttons side by side  
+buttonFIVE.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button 6  
+buttonSIX = Button(  
+    frameTwo,  
+    text = "6",  
+    font = ("Cambria", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_6_is_Clicked  
+)  
+# placing buttons side by side  
+buttonSIX.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button +  
+buttonADD = Button(  
+    frameTwo,  
+    text = "+",  
+    font = ("Cambria", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_Add_is_Clicked  
+)  
+# placing buttons side by side  
+buttonADD.pack(side = LEFT, expand = True, fill = "both")  
+  
+# buttons for third frame  
+# button 7  
+buttonSEVEN = Button(  
+    frameThree,  
+    text = "7",  
+    font = ("Cambria", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_7_is_Clicked  
+)  
+# placing buttons side by side  
+buttonSEVEN.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button 8  
+buttonEIGHT = Button(  
+    frameThree,  
+    text = "8",  
+    font = ("Cambria", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_8_is_Clicked  
+)  
+# placing buttons side by side  
+buttonEIGHT.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button 9  
+buttonNINE = Button(  
+    frameThree,  
+    text = "9",  
+    font = ("Cambria", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_9_is_Clicked  
+)  
+# placing buttons side by side  
+buttonNINE.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button -  
+buttonSUB = Button(  
+    frameThree,  
+    text = "-",  
+    font = ("times", 22),  
+    relief = GROOVE,  
+    border = 2,  
+    command = button_Sub_is_Clicked  
+)  
+# placing buttons side by side  
+buttonSUB.pack(side = LEFT, expand = True, fill = "both")  
+  
+# buttons for fourth frame  
+# button 0  
+buttonZERO = Button(  
+    frameFour,  
+    text = "0",  
+    font = ("times", 22),  
+    relief = GROOVE,  
+    border = 0,  
+    command = button_0_is_Clicked  
+)  
+# placing buttons side by side  
+buttonZERO.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button *  
+buttonMUL = Button(  
+    frameFour,  
+    text = "*",  
+    font = ("times", 22),  
+    relief = GROOVE,  
+    border = 2,  
+    command = button_Mul_is_Clicked  
+)  
+# placing buttons side by side  
+buttonMUL.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button /  
+buttonDIV = Button(  
+    frameFour,  
+    text = "/",  
+    font = ("times", 22),  
+    relief = GROOVE,  
+    border = 2,  
+    command = button_Div_is_Clicked  
+)  
+# placing buttons side by side  
+buttonDIV.pack(side = LEFT, expand = True, fill = "both")  
+  
+# button +  
+buttonEQUAL = Button(  
+    frameFour,  
+    text = "=",  
+    font = ("times", 22),  
+    relief = GROOVE,  
+    border = 10,  
+    command = res  
+)  
+# placing buttons side by side  
+buttonEQUAL.pack(side = LEFT, expand = True, fill = "both")  
+  
+# running the GUI  
+guiWindow.mainloop()