diff --git a/README.md b/README.md
index eb098ed..8557e02 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@
 |  6.9. | Kolloquium |
 
 ## Content
+
 - I2C
     - v2
         - [x] Umbau
@@ -80,7 +81,7 @@
     - [ ] regulate the system (with missing information)
         - [ ] write / formulate approach and resulting formula / algorithm
 
-## ToC
+## Table of Contents
 
 - Introduction
     - What is this about?
diff --git a/parts/intro.tex b/parts/intro.tex
index 6897321..89add6d 100644
--- a/parts/intro.tex
+++ b/parts/intro.tex
@@ -1,23 +1,33 @@
 %! TEX root = ../thesis.tex
 
+
 \chapter{Introduction}
 
-\section{What is this about?}
+\section{What is the BrainScale System?}
 
-\section{What's the PowerIt Subsystem?}
+The BrainScaleS Wafer System, developed and used in the electronic visions Group at Heidelberg University is a neuromorhic hardware implementation.
+
+For this Thesis important core components, inside the System, are the mixed-signal ASICs, named HICANNs (on Wafer in fig. \ref{wss}), and FPGAs for controlling these HICANNs \cite{hbpguidebook-brainscales}
 
-The hardware used in this thesis is a PowerIt board, developed in the electronic visions group\footnote{
-    %TODO    
-}. It functions as power supply inside of the WaferScale System\footnote{
-    %TODO
-} (fig. \ref{wss}). 
 \begin{figure}[h]
     \centering
     \includegraphics[width=.9\textwidth]{../InternReport/img/waferscale_system.png}
-    \caption{WSS}
+    \caption{The BrainScaleS wafer-scale hardware system}
     \label{wss}
 \end{figure}
-In which it is providing the Wafer with 1.8V and the FPGAs with 9.6V. Its maximum rated power draw is 2kW. 
+
+\section{What's the PowerIt Subsystem?}
+
+The hardware used in this thesis is a PowerIt board (fig. \ref{}), developed in the electronic visions group. It functions as power supply inside of the Waferscale System (fig. \ref{wss}). 
+
+\begin{figure}[h]
+    \centering
+    \includegraphics[width=.9\textwidth]{../InternReport/img/poweritv2_teststand_2}
+    \caption{PowerIt Board top view, in test}
+    \label{}
+\end{figure}
+
+In which it is providing the Wafer with 1.8V and the FPGAs with 9.6V. Its maximum rated Pwerdraw is 2kW. 
 
 <containing intro to system and board>
 
diff --git a/thesis.tex b/thesis.tex
index 2a155c1..05d8897 100644
--- a/thesis.tex
+++ b/thesis.tex
@@ -24,4 +24,7 @@
     \include{parts/experiments}
     \include{parts/results}
     \include{parts/outlook}
+
+    \bibliographystyle{ieeetr}
+    \bibliography{ubib/ubib}{}
 \end{document}