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            <div class="col-xs-12 col-sm-6 col-md-4">
                <h3><a href="a/index.html">A - Programové a datové soubory</a></h3>
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                <h3><a href="b/index.html">B - Operační systémy</a></h3>
                <ul>
                    <li>Systémové programy</li>
                    <li>Uživatelské rozhraní OS</li>
                    <li>Historie OS</li>
                    <li>Současné OS</li>
                </ul>
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                <h3><a href="c/index.html">C - Ovladače, firmware a utility</a></h3>
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                    libero mollitia repudiandae placeat exercitationem.</p>
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            &nbsp
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                <h3><a href="d/index.html">D - Aplikační software</a></h3>
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                    libero mollitia repudiandae placeat exercitationem.</p>
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                <h3><a href="e/index.html">E - Instalace programů</a></h3>
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                    libero mollitia repudiandae placeat exercitationem.</p>
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                <h3><a href="f/index.html">F - Softwarové licence</a></h3>
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                    libero mollitia repudiandae placeat exercitationem.</p>
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