Data Science and related stuff.
Some cool cheat sheets
http://www.kdnuggets.com/2015/07/good-data-science-machine-learning-cheat-sheets.html
Obviously not a substitute for anything, ut nice to have around for sure.

http://www.kdnuggets.com/2015/07/good-data-science-machine-learning-cheat-sheets.html
Obviously not a substitute for anything, ut nice to have around for sure.