                             </ul>
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                            <div class="tab-pane fade" id="patterns" role="tabpanel">
                                <h5>Common System Design Patterns</h5>
                                <div class="accordion" id="patternAccordion">
                                    <div class="accordion-item">
                                        <h2 class="accordion-header">
                                            <button class="accordion-but