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diff --git a/Programming_With_Java_A_Primer/chapter16.ipynb b/Programming_With_Java_A_Primer/chapter16.ipynb
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+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:218fbe19da172953280529e0559355d55a34bf2741e9ecd127042579a2a52e47"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 16: Managing Input/Output file"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "example 16.1, page no. 300"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "fr = open(\"input.txt\", \"r\")\n",
+      "fw = open(\"output.txt\", \"w\")\n",
+      "my_str = fr.readline()\n",
+      "\n",
+      "for letter in my_str:\n",
+      "   fw.write(letter)   \n",
+      "#close a file\n",
+      "fr.close()\n",
+      "fw.close()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 16.2, page no. 303"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "fw = open(\"cities.txt\", \"w\")\n",
+      "cities = ['Delhi\\n','Madras\\n','London\\n'];\n",
+      "count = len(cities)\n",
+      "for city in cities:\n",
+      "    fw.write(city)   \n",
+      "fw.close()\n",
+      "fr = open(\"cities.txt\", \"r\")\n",
+      "for line in fr.readlines():\n",
+      "    print line,"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Delhi\n",
+        "Madras\n",
+        "London\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 16.3 is done using CLI which is not possible in IPython Notebook"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 16.4, page no. 305"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "\"\"\"\n",
+      "there is no bytes stream in Python. We will use normal file operations to copy from one file to another\n",
+      "\"\"\"\n",
+      "\n",
+      "fr = open(\"in.txt\", \"r\")\n",
+      "fw = open(\"out.txt\", \"w\")\n",
+      "for line in fr.readlines():\n",
+      "   fw.write(line)       \n",
+      "fr.close()\n",
+      "fw.close()\n",
+      "\n",
+      "fw = open(\"out.txt\", \"r\")\n",
+      "for line in fw.readlines():\n",
+      "    print line"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Java programming for internet.\n",
+        "\n",
+        "Javascript for webpage develpoment.\n",
+        "\n",
+        "Perl for server side scripting.\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 16.5, page no. 307"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\"\"\"\n",
+      "Note: In Python you can store data in file only as string.\n",
+      "\"\"\"\n",
+      "\n",
+      "fos = open(\"prim.dat\", \"w\")\n",
+      "fos.write(str(1999)+'\\n')\n",
+      "fos.write(str(375.85)+'\\n')\n",
+      "fos.write(str(False)+'\\n')\n",
+      "fos.write(\"x\"+'\\n')\n",
+      "fos.close()\n",
+      "\n",
+      "fis = open(\"prim.dat\", \"r\")\n",
+      "for line in fis.readlines():\n",
+      "    print line\n",
+      "fis.close()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "1999\n",
+        "\n",
+        "375.85\n",
+        "\n",
+        "False\n",
+        "\n",
+        "x\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 16.6, page no. 308"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "from random import *\n",
+      "\n",
+      "dos = open(\"rand.dat\", \"w\")\n",
+      "try:\n",
+      "    for i in range(20):\n",
+      "        dos.write(str(randint(0,100))+'\\n')\n",
+      "except IOError:\n",
+      "    print IOError.message\n",
+      "finally:\n",
+      "    dos.close()\n",
+      "\n",
+      "dis = open(\"rand.dat\", \"r\")\n",
+      "# Note: random numbers are generated so output will differ from that given in the textbook.\n",
+      "for line in dis.readlines():\n",
+      "    print line,"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "92\n",
+        "49\n",
+        "68\n",
+        "67\n",
+        "71\n",
+        "25\n",
+        "85\n",
+        "53\n",
+        "10\n",
+        "87\n",
+        "15\n",
+        "5\n",
+        "33\n",
+        "30\n",
+        "72\n",
+        "52\n",
+        "80\n",
+        "85\n",
+        "36\n",
+        "84\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 16.7, page no. 310"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "file1 = open(\"file1.txt\", \"r\")\n",
+      "file2 = open(\"file2.txt\", \"r\")\n",
+      "file3 = open(\"file3.txt\", \"a\")\n",
+      "\n",
+      "for line in file1.readlines():\n",
+      "    file3.write(line)\n",
+      "for line in file2.readlines():\n",
+      "    file3.write(line)\n",
+      "    \n",
+      "file1.close()\n",
+      "file2.close()\n",
+      "file3.close()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 5
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 16.8, page no. 312"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "fp = open(\"random.dat\", \"w+\")\n",
+      "fp.write(\"x\\n\")\n",
+      "fp.write(str(555)+'\\n')\n",
+      "fp.write(str(3.1412)+'\\n')\n",
+      "fp.seek(0)\n",
+      "print fp.readline()\n",
+      "print fp.readline()\n",
+      "print fp.readline()\n",
+      "fp.seek(2)\n",
+      "print fp.readline()\n",
+      "fp.seek(fp.tell()+len(fp.readline()))\n",
+      "fp.write(\"False\\n\")\n",
+      "fp.seek(13)\n",
+      "print fp.readline()\n",
+      "fp.close()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "x\n",
+        "\n",
+        "555\n",
+        "\n",
+        "3.1412\n",
+        "\n",
+        "555\n",
+        "\n",
+        "False\n",
+        "\n"
+       ]
+      }
+     ],
+     "prompt_number": 6
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 16.9, page no. 314"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "fp = open(\"cities.txt\", \"a\")\n",
+      "fp.write(\"Mumbai\\n\")\n",
+      "fp.close()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 85
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 16.10, page no. 315"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "\n",
+      "dos = open(\"invent.dat\", \"w\")\n",
+      "dos.write(raw_input(\"Enter code number: \")+'\\n')\n",
+      "dos.write(raw_input(\"Enter number of items: \")+'\\n')\n",
+      "dos.write(raw_input(\"Enter cost: \")+'\\n')\n",
+      "dos.close()\n",
+      "dis = open(\"invent.dat\", \"r\")\n",
+      "codeNumber = int(dis.readline())\n",
+      "totalItems = int(dis.readline())\n",
+      "itemCost = int(dis.readline())\n",
+      "totalCost = totalItems*itemCost\n",
+      "dis.close()\n",
+      "\n",
+      "print \"Code Number: \", codeNumber\n",
+      "print \"Item Cost: \", itemCost\n",
+      "print \"Total Items: \", totalItems\n",
+      "print \"Total Cost: \",  totalCost"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "name": "stdout",
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Enter code number: 1001\n"
+       ]
+      },
+      {
+       "name": "stdout",
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Enter number of items: 193\n"
+       ]
+      },
+      {
+       "name": "stdout",
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Enter cost: 452\n"
+       ]
+      },
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Code Number:  1001\n",
+        "Item Cost:  452\n",
+        "Total Items:  193\n",
+        "Total Cost:  87236\n"
+       ]
+      }
+     ],
+     "prompt_number": 91
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
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