li><a href="//en.wikipedia.org/wiki/Imperial_and_US_customary_measurement_systems" title="Imperial and US customary measurement systems">Overview</a></li>
<li><a href="//en.wikipedia.org/wiki/Comparison_of_the_imperial_and_US_customary_measurement_systems" title="Comparison of the imperial and US customary measurement systems">Comparison</a></li>
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<th scope="row" class="navbox-group">Historic</th>
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