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<a accesskey="3" href="page.php?w=complex_system&amp;p=2">3.Next</a>
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<p>A <b>complex system</b> is a <a href="page.php?w=system">system</a> composed of many components that interact with one another. Examples of complex systems are Earth's global <a href="page.php?w=climate">climate</a>, <a href="page.php?w=organisms">organisms</a>, the <a href="page.php?w=human_brain">human brain</a>, infrastructure such as <a href="page.php?w=power_grid">power grid</a>, transportation or communication systems, complex <a href="page.php?w=software">software</a> and electronic systems, social and economic organizations (like <a href="page.php?w=cities">cities</a>),</p><p>
<a accesskey="3" href="page.php?w=complex_system&amp;p=2">3.Next</a>
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