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![The Johnson SB distribution](https://blogs.sas.com/content/iml/files/2020/01/JohnsonSB1-640x336.png)
From the early days of probability and statistics, researchers have tried to organize and categorize parametric probability distributions. For example, Pearson (1895, 1901, and 1916) developed a system of seven distributions, which was later called the Pearson system. The main idea behind a "system" of distributions is that for each