diff --git a/Employee Class.ipynb b/Employee Class.ipynb
index 3ee4690..81a020d 100644
--- a/Employee Class.ipynb	
+++ b/Employee Class.ipynb	
@@ -11,11 +11,19 @@
      "text": [
       "1.04\n",
       "1.04\n",
-      "1.04\n",
-      "1.1\n",
-      "1.1\n",
-      "1.1\n"
+      "Soumyadip\n",
+      "Hello\n"
      ]
+    },
+    {
+     "data": {
+      "text/plain": [
+       "'Soumyadip Chowdhury s.c@python.com 100000'"
+      ]
+     },
+     "execution_count": 17,
+     "metadata": {},
+     "output_type": "execute_result"
     }
    ],
    "source": [
@@ -24,38 +32,26 @@
     "    no_empl=0;\n",
     "    raise_amount=1.04\n",
     "    \n",
-    "    def __init__(self,f ,l ,p ):\n",
-    "        self.first=f\n",
-    "        self.last=l\n",
-    "        self.email=f+\".\"+l+\"@python.com\"\n",
-    "        self.pay=p\n",
+    "    def __init__(self):\n",
+    "        self.first=\"Soumyadip\"\n",
+    "        self.last=\"Chowdhury\"\n",
+    "        self.email=\"s.c@python.com\"\n",
+    "        self.pay=100000\n",
     "        Employee.no_empl=Employee.no_empl+1\n",
     "        \n",
     "        \n",
     "    def print(self):\n",
+    "        print(\"Hello\")\n",
     "        return \"{} {} {} {}\".format(self.first,self.last,self.email,self.pay)\n",
     "   \n",
-    "    def apply_raise(self):\n",
-    "        self.pay=int(self.pay* self.raise_amount)\n",
-    "    ## Can print using class,self and obj name    \n",
-    "    \n",
-    "    @classmethod\n",
-    "    def set_raise_amt(cls,amount):\n",
-    "        cls.raise_amount=amount\n",
     "        \n",
     "        \n",
-    "emp_1=Employee(\"Soumyadip\",\"Chowdhury\",900000)\n",
-    "emp_2=Employee(\"Soumyadip\",\"Chowdhury\",100000)\n",
-    "\n",
+    "emp_1=Employee()\n",
     "print(Employee.raise_amount)\n",
     "print(emp_1.raise_amount)\n",
-    "print(emp_2.raise_amount)\n",
     "\n",
-    "Employee.set_raise_amt(1.10)\n",
-    "\n",
-    "print(Employee.raise_amount)\n",
-    "print(emp_1.raise_amount)\n",
-    "print(emp_2.raise_amount)"
+    "print(emp_1.first)\n",
+    "emp_1.print()"
    ]
   },
   {
diff --git a/Employee Obj.ipynb b/Employee Obj.ipynb
index aa868f4..5f46e8f 100644
--- a/Employee Obj.ipynb	
+++ b/Employee Obj.ipynb	
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -15,15 +15,15 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 7,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "<__main__.Employee object at 0x000001C215A66B48>\n",
-      "<__main__.Employee object at 0x000001C21469B348>\n"
+      "<__main__.Employee object at 0x000001D9F490C2C8>\n",
+      "<__main__.Employee object at 0x000001D9F490C308>\n"
      ]
     }
    ],
@@ -34,7 +34,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 9,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -46,14 +46,14 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "<__main__.Employee object at 0x000001C215A66B48>\n",
+      "<__main__.Employee object at 0x000001D9F490C2C8>\n",
       "Soumyadip\n",
       "Chowdhury\n",
       "soumyadip.cmp@gmail.com\n",
diff --git a/Employee Print Object.ipynb b/Employee Print Object.ipynb
index cc4d874..400fe22 100644
--- a/Employee Print Object.ipynb	
+++ b/Employee Print Object.ipynb	
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 19,
+   "execution_count": 8,
    "metadata": {},
    "outputs": [
     {
@@ -10,18 +10,8 @@
      "output_type": "stream",
      "text": [
       "Soumyadip Chowdhury Soumyadip.Chowdhury@python.com 900000\n",
-      "Soumyadip Chowdhury Soumyadip.Chowdhury@python.com 100000\n"
-     ]
-    },
-    {
-     "ename": "TypeError",
-     "evalue": "print() missing 1 required positional argument: 'self'",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
-      "\u001b[1;32m<ipython-input-19-b7dac7318036>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[0;32m     15\u001b[0m \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0memp_1\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     16\u001b[0m \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0memp_2\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m---> 17\u001b[1;33m \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mEmployee\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m     18\u001b[0m \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mEmployee\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0memp_2\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
-      "\u001b[1;31mTypeError\u001b[0m: print() missing 1 required positional argument: 'self'"
+      "Bristi Biswas Bristi.Biswas@python.com 100000\n",
+      "True\n"
      ]
     }
    ],
@@ -36,14 +26,14 @@
     "        \n",
     "    def print(self):\n",
     "        return \"{} {} {} {}\".format(self.first,self.last,self.email,self.pay)\n",
-    "    \n",
-    "    \n",
+    "  \n",
+    "\n",
     "emp_1=Employee(\"Soumyadip\",\"Chowdhury\",900000)\n",
-    "emp_2=Employee(\"Soumyadip\",\"Chowdhury\",100000)\n",
+    "emp_2=Employee(\"Bristi\",\"Biswas\",100000)\n",
     "print(emp_1.print())\n",
     "print(emp_2.print())\n",
-    "print(Employee.print(emp_1))\n",
-    "print(Employee.print(emp_2))"
+    "\n",
+    "print(isinstance(emp_1,Employee))"
    ]
   }
  ],
diff --git a/Employee isInstanse & isSubclass.ipynb b/Employee isInstanse & isSubclass.ipynb
index 197f94f..72c7cc2 100644
--- a/Employee isInstanse & isSubclass.ipynb	
+++ b/Employee isInstanse & isSubclass.ipynb	
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [
     {
@@ -16,7 +16,7 @@
       "True\n",
       "True\n",
       "True\n",
-      "True\n",
+      "(<class '__main__.Manager'>, <class '__main__.Employee'>)\n",
       "False\n"
      ]
     }
diff --git a/README.md b/README.md
index 869eeb8..2d75e1f 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,2 @@
-# Object-Oriented-Programming-Using-Python
\ No newline at end of file
+# Object-Oriented-Programming-Using-Python
+Python is a multi-paradigm programming language. Meaning, it supports different programming approach. One of the popular approach to solve a programming problem is by creating objects. This is known as Object-Oriented Programming (OOP).