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diff --git a/back/summary.tex b/back/summary.tex
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--- a/back/summary.tex
+++ b/back/summary.tex
@@ -6,12 +6,21 @@
 \input{subfileprefix}
 \chapter{Summary}%
 \label{chp:summary}
-\begin{center}
-
+%\begin{center}
 \noindent%
-This is a summary of 350--400 words.
+The amount of computers around us is growing exponentially.
+With it, the systems in which they operate are becoming more and more complex.
+Many of these computers are so called \emph{edge devices}.
+For a special class of systems, \glsxtrlong{IOT} systems, they perform the interaction with the world.
+Powered by microcontrollers, these specialised computers have little memory, slow processors, and support slow communication methods.
+On the other hand, they are also cheap, tiny, consume little energy, and can easily equipped with various sensors and actuators.
 
-\end{center}
+There is a great variety within edge devices but also between edge devices and more conventional computers.
+However, they do have to communicate with the conventional computers.
+This results in semantic friction, an impedance mismatch.
+Developing and maintaining such systems is expensive and error prone.
 
+This is a summary of 350--400 words.
+%\end{center}
 \input{subfilepostamble}
 \end{document}