Data Science Ontology
From Sean McClure Data Scientist and author of the blog ThoughtWorks.
You can see the an expandable ontology visualization. Check it out here: http://www.datascienceontology.com.
Although by no means exhaustive of every idea, the hope is that there is sufficient depth and detail to help guide and teach newcomers as they try to understand the tools and approaches of data science. Since Wikipedia represents a curated collection of knowledge from a variety of experts it made sense to connect wikis to the low-level concepts to assist those interested in learning more. I would encourage those interested in data science to use the ontology as a starting point, and dig deeper on your own as you learn how each of the concepts fit into the bigger picture. Every concept is a result of decades of work in a particular area, each made to study phenomena from a different angle and to address challenges in a variety of domains.