diff --git a/README.md b/README.md
index 73c636d..59f7965 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,12 @@ If you find mistakes, please open an issue or fix them yourself and open a PR.
 - [Numerical Methods for Computer Science Summary (DE)](./semester3/numcs/numcs-summary.pdf) Authors: Robin Bacher, Janis Hutz
 - [Systems Programming and Computer Architecture Summary (EN)](./semester3/spca/spca-summary.pdf) Authors: Robin Bacher, Janis Hutz
 
+### Semester 4
+- [Formal Methods & Functional Programming Summary (EN)](./semester4/fmfp/formal-methods-functional-programming-summary.pdf)
+- [Data Modelling & Databases Summary (EN)](./semester4/dmdb/data-modelling-databases-summary.pdf)
+- [Probability & Statistics Cheat-Sheet (TBD)](./semester4/ps/probability-and-statistics-cheatsheet.pdf)
+- [Computer Networks (EN)](./semester4/cn/computer-networks-summary.pdf)
+
 
 ## Contributing
 Clone this repo locally using
diff --git a/semester4/cn/computer-networks-summary.pdf b/semester4/cn/computer-networks-summary.pdf
new file mode 100644
index 0000000..a86c636
Binary files /dev/null and b/semester4/cn/computer-networks-summary.pdf differ
diff --git a/semester4/cn/computer-networks-summary.tex b/semester4/cn/computer-networks-summary.tex
new file mode 100644
index 0000000..9df92b0
--- /dev/null
+++ b/semester4/cn/computer-networks-summary.tex
@@ -0,0 +1,13 @@
+\documentclass{article}
+
+\input{~/projects/latex/dist/recommended.tex}
+
+\setup{Computer Networks}
+
+\begin{document}
+\startDocument
+\usetcolorboxes
+
+
+
+\end{document}
diff --git a/semester4/dmdb/data-modelling-databases-summary.pdf b/semester4/dmdb/data-modelling-databases-summary.pdf
new file mode 100644
index 0000000..98637f5
Binary files /dev/null and b/semester4/dmdb/data-modelling-databases-summary.pdf differ
diff --git a/semester4/dmdb/data-modelling-databases-summary.tex b/semester4/dmdb/data-modelling-databases-summary.tex
new file mode 100644
index 0000000..3a01580
--- /dev/null
+++ b/semester4/dmdb/data-modelling-databases-summary.tex
@@ -0,0 +1,13 @@
+\documentclass{article}
+
+\input{~/projects/latex/dist/recommended.tex}
+
+\setup{Data Modelling and Databases}
+
+\begin{document}
+\startDocument
+\usetcolorboxes
+
+
+
+\end{document}
diff --git a/semester4/fmfp/formal-methods-functional-programming-summary.pdf b/semester4/fmfp/formal-methods-functional-programming-summary.pdf
new file mode 100644
index 0000000..9002c78
Binary files /dev/null and b/semester4/fmfp/formal-methods-functional-programming-summary.pdf differ
diff --git a/semester4/fmfp/formal-methods-functional-programming-summary.tex b/semester4/fmfp/formal-methods-functional-programming-summary.tex
new file mode 100644
index 0000000..23ec7a5
--- /dev/null
+++ b/semester4/fmfp/formal-methods-functional-programming-summary.tex
@@ -0,0 +1,13 @@
+\documentclass{article}
+
+\input{~/projects/latex/dist/recommended.tex}
+
+\setup{Formal Methods and Functional Programming}
+
+\begin{document}
+\startDocument
+\usetcolorboxes
+
+
+
+\end{document}
diff --git a/semester4/ps/probability-and-statistics-cheatsheet.pdf b/semester4/ps/probability-and-statistics-cheatsheet.pdf
new file mode 100644
index 0000000..c36fdef
Binary files /dev/null and b/semester4/ps/probability-and-statistics-cheatsheet.pdf differ
diff --git a/semester4/ps/probability-and-statistics-cheatsheet.tex b/semester4/ps/probability-and-statistics-cheatsheet.tex
new file mode 100644
index 0000000..461550b
--- /dev/null
+++ b/semester4/ps/probability-and-statistics-cheatsheet.tex
@@ -0,0 +1,13 @@
+\documentclass{article}
+
+\input{~/projects/latex/dist/recommended.tex}
+
+\setup{Probability and Statistics}
+
+\begin{document}
+\startDocument
+\usetcolorboxes
+
+
+
+\end{document}