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			<dl>
				<dt><a href="basics.h">basics.h</a>
				<dd>Several I/O devices and basic gates.
				<dt><a href="one_bit_adder.h">one_bit_adder.h</a>
				<dd>A one-bit full adder composed of basic gates.
				<dt><a href="four_bit_adder.h">four_bit_adder.h</a>
				<dd>A four-bit full adder composed of one-bit adders.
				<dt><a href="D_latch.h">D_latch.h</a>
				<dd>A D-latch composed of basic gates.
				<dt><a href="test_all.cpp">test_all.cpp</a>
				<dd>A simple test program that exercises th