2.4 Who uses it?

R continues to increase in popularity. Among data scientists it is second only to Python. Among academics it has eclipsed SAS in many fields. It is also used by analyses in many large companies, such Facebook, and by journalists looking for stories in or reporting on large volumes of data

see http://blog.revolutionanalytics.com/2014/05/companies-using-r-in-2014.html for further discussion.