diff --git a/Doc/Sd1/Ref/LangFundament/floatConverter.png b/Doc/Sd1/Ref/LangFundament/floatConverter.png
new file mode 100644
index 0000000000000000000000000000000000000000..7ddbe77f9b57abe0e6b70f34908c05fc8e1e8bc7
Binary files /dev/null and b/Doc/Sd1/Ref/LangFundament/floatConverter.png differ
diff --git a/Doc/Sd1/languageFundamentals.xml b/Doc/Sd1/languageFundamentals.xml
index 931a3c99e460e99247510fb3f333acbe75a52ba9..935496e374efca86add969c7af56217ffd47dd60 100644
--- a/Doc/Sd1/languageFundamentals.xml
+++ b/Doc/Sd1/languageFundamentals.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<chapter annotations="slide" version="5.0" xml:id="sw1LanguageFundamental"
+<chapter annotations="slide" version="5.1" xml:id="sw1LanguageFundamental"
          xmlns="http://docbook.org/ns/docbook"
          xmlns:xlink="http://www.w3.org/1999/xlink"
          xmlns:xila="http://www.w3.org/2001/XInclude/local-attributes"
@@ -768,11 +768,81 @@ Octal 35</programlisting></td>
           </tr>
         </informaltable>
       </figure>
-    </section>
-  </section>
 
-  <section xml:id="sd1_sect_langFundamental_exercises">
-    <title>Exercises</title>
+      <figure xml:id="sd1_fig_intLiteralLimitExcess">
+        <title>Know your limits!</title>
+
+        <programlisting language="java">System.out.println(10000000000<emphasis
+            role="bold">L</emphasis>);  // o.K.
+System.out.println(10000000000 );  // Compile time error: Integer number too large</programlisting>
+      </figure>
+
+      <figure xml:id="sd1_fig_javaLiterals">
+        <title><xref linkend="glo_Java"/> literals</title>
+
+        <informaltable border="1">
+          <tr>
+            <td><code>byte</code>, <code>short</code></td>
+
+            <td>-</td>
+          </tr>
+
+          <tr>
+            <td><code>char</code></td>
+
+            <td><code>'A'</code>, <code>'\u0041'</code></td>
+          </tr>
+
+          <tr>
+            <td><code>int</code></td>
+
+            <td><code>29</code>, <code>0b1_1101</code>, <code>0x1D</code>,
+            <code>035</code>, <code>-29</code>,</td>
+          </tr>
+
+          <tr>
+            <td><code>long</code></td>
+
+            <td><code>35L</code>, <code>0b10_0011L</code>, <code>0x23L</code>,
+            <code>043L</code>, <code>-35L</code>,...</td>
+          </tr>
+
+          <tr>
+            <td><code>float</code></td>
+
+            <td><code>55.43F</code>, <code>1.7E-23F</code>, <code>-17.F,
+            100_342.334_113</code></td>
+          </tr>
+
+          <tr>
+            <td><code>double</code></td>
+
+            <td><code>55.43</code>, <code>1.7 E -23</code>,
+            <code>-17.</code></td>
+          </tr>
+
+          <tr>
+            <td><code>String</code></td>
+
+            <td><code>"Hello"</code>, <code>"Greek Δ"</code>, <code>"Greek
+            <link
+            xlink:href="https://www.fileformat.info/info/unicode/char/0394/index.htm">\u0394</link>"</code></td>
+          </tr>
+
+          <tr>
+            <td><code>boolean</code></td>
+
+            <td><code>true</code>, <code>false</code></td>
+          </tr>
+
+          <tr>
+            <td/>
+
+            <td><code>null</code></td>
+          </tr>
+        </informaltable>
+      </figure>
+    </section>
 
     <section xml:id="sd1_sect_arithmeticLimitations">
       <title>Arithmetic limitations</title>
@@ -789,7 +859,7 @@ byte points = 130; // Compile error: Incompatible types
       </figure>
 
       <figure xml:id="sd1_fig_byteOverflow">
-        <title>Funny things</title>
+        <title>Overflow</title>
 
         <programlisting language="java">int count  = 2147483647;
 int points = 2147483647;
@@ -828,10 +898,24 @@ System.out.println("Expected value: "   +  Long.MAX_VALUE);</programlisting>
         <para>Result:</para>
 
         <programlisting language="none">   Float value: 9223372036854776000.000000
-Expected value: 9223372036854775807
-</programlisting>
+Expected value: 9223372036854775807</programlisting>
+      </figure>
+
+      <figure xml:id="sd1_fig_floatConverter">
+        <title><uri
+        xlink:href="https://www.h-schmidt.net/FloatConverter">https://www.h-schmidt.net/FloatConverter</uri></title>
+
+        <mediaobject>
+          <imageobject>
+            <imagedata fileref="Ref/LangFundament/floatConverter.png"/>
+          </imageobject>
+        </mediaobject>
       </figure>
     </section>
+  </section>
+
+  <section xml:id="sd1_sect_langFundamental_exercises">
+    <title>Exercises</title>
 
     <section xml:id="sw1LegalVariableName">
       <title>Legal variable names</title>
@@ -1920,6 +2004,38 @@ System.out.println("Character: " + arabicChar);</programlisting>
           </qandadiv>
         </qandaset>
       </section>
+
+      <section xml:id="sd1_sect_literalProblem">
+        <title>Literal problem</title>
+
+        <qandaset defaultlabel="qanda" xml:id="sd1_qanda_literalProblem">
+          <qandadiv>
+            <qandaentry>
+              <question>
+                <para>Consider:</para>
+
+                <programlisting language="java">System.out.println(048);</programlisting>
+
+                <para>This yields a compile time error <quote>Integer number
+                too large</quote>. On contrary the following code will compile
+                and run perfectly well:</para>
+
+                <programlisting language="java">System.out.println(047);</programlisting>
+
+                <para>Explain the underlying problem.</para>
+              </question>
+
+              <answer>
+                <para>The literal <quote>048</quote> is meant to be octal
+                representation. Unfortunately the only digits in octal
+                representations range from 0 to 7. So <quote>047</quote> is
+                fine but <quote>048</quote> simply is no valid literal in
+                <xref linkend="glo_Java"/>.</para>
+              </answer>
+            </qandaentry>
+          </qandadiv>
+        </qandaset>
+      </section>
     </section>
 
     <section xml:id="sw1SectSimpleExpressions">