Back in 2005, I had a chance to research on the list of published dictionaries of Pashto language. Interestingly, literature study showed that the first Pashto dictionary was published in 1806 by the title of Riaz-ul Mohabbat authored by Nawab Mohabbat Khan. This pdf file contains a list of 58 dictionaries with their description, author name, published date, number of words and the country or publishers name.