What five events occurred on Pentecost?

In the book of Acts, chapter 2:

1. A gathering in the upper room, in one accord, in prayer
2. The Holy Spirit came sounding like a mighty, rushing wind, and appearing like tongues of fire
3. They were filled with the Holy Spirit and began to speak in other tongues, then a crowd gathered because each one heard them speaking in his own language
4. The apostle Peter preached for the first time
5. Three thousand were converted and baptized