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 <li><b>Sets</b> are unordered bags of values.
 <li><b>Dictionaries</b> are unordered bags of key-value pairs.
 </ol>
-<p>Of course, there are a lot more types than these seven. <a href=your-first-python-program.html#everythingisanobject>Everything is an object</a> in Python, so there are types like <i>module</i>, <i>function</i>, <i>class</i>, <i>method</i>, <i>file</i>, and even <i>compiled code</i>. You&#8217;ve already seen some of these: <a href=your-first-python-program.html#runningscripts>modules have names</a>, <a href=your-first-python-program.html#docstrings>functions have <code>docstrings</code></a>, <i class=baa>&amp;</i>c. You&#8217;ll learn about classes in [FIXME xref] and files in [FIXME xref].
+<p>Of course, there are a lot more types than these seven. <a href=your-first-python-program.html#everythingisanobject>Everything is an object</a> in Python, so there are types like <i>module</i>, <i>function</i>, <i>class</i>, <i>method</i>, <i>file</i>, and even <i>compiled code</i>. You&#8217;ve already seen some of these: <a href=your-first-python-program.html#runningscripts>modules have names</a>, <a href=your-first-python-program.html#docstrings>functions have <code>docstrings</code></a>, <i class=baa>&amp;</i>c. You&#8217;ll learn about classes in <a href=iterators.html>Classes <i class=baa>&amp;</i> Iterators</a>, and about files in [FIXME xref].
 <p>Strings and bytes are important enough&nbsp;&mdash;&nbsp;and complicated enough&nbsp;&mdash;&nbsp;that they get their own chapter. Let&#8217;s look at the others first.
 <p class=a>&#x2042;