Protestantism encompasses the forms of Christian faith and practice that originated with the doctrines of the Reformation
It is in contradistinction to that of Roman Catholicism
The word Protestant is derived from the Latin protestation meaning declaration which refers to the letter of protestation by Lutheran princes against the decision of the Diet of Speyer in 1529, which reaffirmed the edict of the Diet of Worms against the Reformation. Since that time, the term Protestantism has been used in many different senses.
Mainline Protestants?a North American phrase?are those who trace their lineage to Luther, Calvin, or Anglicanism. These groups observe the doctrines of the Reformation. They include such denominations as Lutherans, Presbyterians, and Methodists
Anabaptists are part of a movement that developed from the Radical Reformation. Today, denominations such as Baptists, Pentecostals, Adventists, Brethren, Mennonites and Amish eschew infant baptism and see baptism as aligned with a demonstration of the gifts of the spirit.
Lutherans believe that the Bible, as a divinely inspired book, is the source of all revealed divine knowledge.
Pentecostalism is a religious movement within Christianity that places special emphasis on the direct personal experience of God through the baptism of the Holy Spirit, as shown in the Biblical account of the Day of Pentecost.
There are two large streams of Pentecostal churches
To the first group, speaking in tongues is the sign of the baptism of the Holy Spirit, but is not necessary for salvation
The second group emphasizes a salvation message based on Acts 2:38 which says that a person needs to repent and be baptized in the name of the Lord Jesus, and then receive the Holy Spirit. To these Pentecostals, receiving the Holy Spirit is necessary for salvation and is accompanied by speaking in tongues.