Can someone point me to a well written reading (preferably, up to 2 pages) in Russian on the subject of "what is data science?"
The audience is educated people, but not specialists in statistics. The focus must be on applications, not theory and research.
It depends on your needs. I would recommend to translate from English any introductory notes you can find on data science. There are vast amount of such notes and short essays on the web. If you would like to learn more about data science and machine learning, you could look at the coursera course on Introduction to Machine Learning given by Higher School of Economics (in Russian):
