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<p>for such a system.</p>

<p>Modifying a system in a way that does not allow backward compatibility is sometimes called "<a href="page.php?w=wikt%3Abreaking_change">breaking</a>" backward compatibility. Such breaking usually incurs various types of costs, such as <a href="page.php?w=Switching_barriers">switching cost</a>.</p>

<p>A complementary concept is <a href="page.php?w=forward_compatibility">forward compatibility</a>; a design that is forward-compatible usually has a <a href="page.php?w=Technology_roadmap">roadmap</a> for compatibility with</p><p>
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