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+<page xmlns="http://projectmallard.org/1.0/"
+ type="guide"
+ id="boolean">
+
+ <info>
+ <link type="guide" xref="index#equation"/>
+ </info>
+
+ <title>Boolean Algebra</title>
+ 
+ <p>
+ Boolean algebra can be calculated using the AND, OR and XOR operators.
+ </p>
+ <example>
+ <p>
+ 010011₂ AND 110101₂
+ </p>
+ </example>
+ <p>
+ Buttons for these symbols are available in <link xref="mouse">programming mode</link>.
+ </p>
+ <p>
+ The NOT <link xref="function">function</link> inverts the bits in a number.
+ The word size is set from the <guiseq><gui>Calculator</gui><gui>Preferences</gui></guiseq> menu.
+ </p>
+ <example>
+ <p>
+ NOT 010011₂
+ </p>
+ </example>
+</page>