For example, last year I kicked the tires on Bloomberg's PORT suite of portfolio performance attribution and risk measurement functions to get a sense of what t

For example, last year I kicked the tires on Bloomberg's PORT suite of portfolio performance attribution and risk measurement functions to get a sense of what they offered and how programmable it was. In addition to the standard extensive help docs, they had 56 white papers totaling ~1400 pages (as of June 2017) explaining the calculations. And that's for a small star in the Bloomberg constellation.