"chapter-item expanded affix "><a href="../introduction.html">Introduction</a></li><li class="chapter-item expanded affix "><a href="../preface/authors_note.html">Author‚Äôs Note</a></li><li class="chapter-item expanded affix "><a href="../preface/how_to_use.html">How to use this book?</a></li><li class="chapter-item expanded affix "><li class="part-title">Preparation</li><li class="chapter-item expanded "><a href="../chapter_1/index.html"><strong aria-hidden="true">1.</strong> Introduction to IoT</a></