The conference started with a brief introduction and explanation of Tidal. The book also contains an Introduction and Epilogue. It also features a new opening introduction and narration. I have multiple examples of early introduction of universal suffrage. The style developed further after the introduction and adaptation of Unicode. See this chapter for an extended introduction. This was later expanded to five vowels with the introduction of Spanish. For a rigorous technical introduction, see Algorithms. Other methods of sample introduction are also utilized. Frahm had an early introduction to music. First, the introduction of the semiconducting layers. He was responsible for the introduction and subsequent spread of Christianity in Poland. This is apparent with the introduction of currency. Later episodes used one of two shortened versions of the introduction. For most of the articles David provided either an introduction or an afternote, or both.