diff --git a/ToDo.md b/ToDo.md
new file mode 100644
index 0000000..7d215aa
--- /dev/null
+++ b/ToDo.md
@@ -0,0 +1,8 @@
+## Known problems to be fixed
+
+- [ ] *Plot3DSys* function has issues when the matrix has a rows made of all zeros
+- [ ] Exercise 4 in Notebook 1.2 displays a *RuntimeWarningError* due to a division by 0, 
+      if the "sliging" parameter *h* is set to 0
+- [ ] *printA* library method fails if it is given a row vector (i.e. a list of int/float)
+      as input
+- [ ] *ipywidgets* have troubles being displayed on **Noto**