diff --git a/report.tex b/report.tex
index 344a151..952c015 100644
--- a/report.tex
+++ b/report.tex
@@ -73,6 +73,16 @@
 		the real-world situtations a computer program models and the ways they
 		interact than a text-based interface could.
 
+		For these reasons, consumer-oriented desktop operating systems have
+		shipped with graphical user interfaces for more than two decades. While
+		there is a small degree of
+		compatibility and interoperability, all major operating systems such
+		as Microsoft Windows, the Mac OS line of operating systems as well
+		as the hundreds of publicly available GNU/Linux distributions
+		provide their own implementation of a graphical user interface. This
+		report aims to present an overview over the implementation of the
+		graphical user interface of Microsoft Windows.
+
 		Rigorously defining requirements for an efficient graphical user
 		interface is outside the scope of this report. Instead, we will focus
 		on one particular aspect: Responsiveness. Users perceive the response