The document introduces the Arabic letter Baa ()ب which is the second letter of the Arabic alphabet. It discusses the basic appearance and pronunciation of Baa, noting it is articulated by closing the two lips together. The document also covers the different forms Baa can take depending on its position in a word (isolated, beginning, middle, end). It describes the characteristics of Baa, including Jahr, Shiddah, Istifaal, Infitaah, Izlaaq and Qalqalah. Common errors in pronouncing Baa are also listed.