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--- a/Doc/Sd1/appendix.xml
+++ b/Doc/Sd1/appendix.xml
@@ -348,6 +348,71 @@
     <para>The following sections contain both the current and archived project
     propositions.</para>
 
+    <section xml:id="sd1BonusCurrency">
+      <title>Currency converter, Summer 2017</title>
+
+      <para>A set of predefined currencies shall be mutually converted. The
+      user will be able to choose both a <quote>buy</quote> and a
+      <quote>sell</quote> currency. The desired <quote>buy</quote> amount
+      shall than be converted into the corresponding <quote>sell</quote>
+      currency amount. The following video illustrates its intended
+      usage:</para>
+
+      <figure xml:id="sd1FigCurrencyConverterVideo">
+        <title>Running the currency converter terminal application.</title>
+
+        <mediaobject>
+          <imageobject>
+            <imagedata fileref="Ref/Video/currencyConverter.webm"/>
+          </imageobject>
+        </mediaobject>
+      </figure>
+
+      <para>You may follow the subsequent steps:</para>
+
+      <orderedlist>
+        <listitem>
+          <para>Choose a suitable representation which allows for defining
+          currencies among with their corresponding conversion rates. A good
+          starting point is being provided by <link
+          xlink:href="https://en.wikipedia.org/wiki/Special_drawing_rights">IMF
+          SDR currency units</link> leading to <link
+          xlink:href="https://www.imf.org/external/np/fin/data/rms_mth.aspx?SelectDate=2017-03-31&amp;reportType=CVSDR">flat
+          currency table structures</link>. These allow for a simple text file
+          representation e.g. <filename>currencies.txt</filename>:</para>
+
+          <programlisting language="none">Chinese Yuan:	9.348070
+Euro:	1.264280
+Japanese Yen:	153.778000
+U.K. Pound Sterling:	1.102940
+U.S. Dollar:	1.356070
+Algerian Dinar:	148.618000
+...</programlisting>
+
+          <para>The rates being provided here allow for converting each
+          currency to its <link
+          xlink:href="https://en.wikipedia.org/wiki/Special_drawing_rights">SDR</link>
+          value. Thus converting e.g. Euro to U.S. Dollar requires a
+          conversion to its <link
+          xlink:href="https://en.wikipedia.org/wiki/Special_drawing_rights">SDR</link>
+          value followed by a second conversion to U.S. Dollar.</para>
+
+          <para>This way we only have to store a single rate for each currency
+          in question.</para>
+        </listitem>
+
+        <listitem>
+          <para>Write a Class which reads the above table and stores all
+          currencies among with their rates in a suitable array.</para>
+        </listitem>
+
+        <listitem>
+          <para>Provide user interface dialogs providing the »glue« between
+          user input and stored currency information.</para>
+        </listitem>
+      </orderedlist>
+    </section>
+
     <section xml:id="sd1SectProjectAddressDatabase">
       <title>An address database, Winter 2016</title>