“… libraries and toolsets-- the de facto standards for practical data science-- that allow you to quickly move…”

“… may equally say that MATLAB is the "bread" in the above statement. MATLAB has became a de facto tool…”

“…Conquer the complexities of this open source statistical language R is fast becoming the de facto…”

“… by AT&T. R has eclipsed S and the commercially-available S-Plus language, and has become the de facto…”