diff --git a/2021-oop1/ku/stream-05/ku-stream-05-folien.pdf b/2021-oop1/ku/stream-05/ku-stream-05-folien.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..6174dd63541b032d74cab1bc188801a991b30ef4
Binary files /dev/null and b/2021-oop1/ku/stream-05/ku-stream-05-folien.pdf differ