diff --git a/ch02data/062basic_plotting.ipynb.py b/ch01python/060basic_plotting.ipynb.py
similarity index 100%
rename from ch02data/062basic_plotting.ipynb.py
rename to ch01python/060basic_plotting.ipynb.py
diff --git a/ch02data/082NumPy.ipynb.py b/ch02data/082NumPy.ipynb.py
index e21894ad..3b210cd2 100644
--- a/ch02data/082NumPy.ipynb.py
+++ b/ch02data/082NumPy.ipynb.py
@@ -30,6 +30,15 @@
 # * [NumPy](https://numpy.org/), a fast numeric computing library offering a flexible *n*-dimensional array type.
 # * [IPython](https://ipython.readthedocs.io/en/stable/overview.html), an interactive Python interpreter that later led to the [Jupyter notebook](https://jupyter.org/) interface.
 #
+# <details><summary>Who created those?</summary>
+# 
+# * [John D. Hunter](https://en.wikipedia.org/wiki/John_D._Hunter) created Matplotlib
+# * [Travis Oliphant](https://en.wikipedia.org/wiki/Travis_Oliphant) is the primary creator of NumPy, founding contributor of SciPy, and he's also the founder of Anaconda
+# * [Fernando Perez](https://en.wikipedia.org/wiki/Fernando_P%C3%A9rez_\(software_developer\)) created IPython
+# 
+# </details>
+# 
+# 
 # By combining a plotting library, a fast numeric library, and an easy-to-use interface allowing live plotting commands in a persistent environment, the powerful capabilities of MATLAB were matched by a free and open toolchain.
 #
 # We've learned about Matplotlib and IPython in this course already. NumPy is the last part of the trilogy.