The Pentecostal-Charismatic movement is particularly distinguished from other Christian movements by its belief in the continuation of the apostolic sign gifts. The term "Pentecostal" dates to the early part of the 20th century and refers to a desire on the part of some to recapture the miracles of Pentecost and the book of Acts. The "Charismatic" movement is of more recent origin and refers to the ecumenical tongues-speaking phenomenon which has spread through non-Pentecostal denominations, including the Roman Catholic Church. I have been examining and re-examining the Pentecostal-Charismatic movements for more than three decades since I was led to Christ by a Pentecostal in 1973 and began to seek God's will about tongues-speaking and the miraculous gifts of the early churches. I have built a large library of materials on this subject and have interviewed Pentecostals and Charismatics and attended their churches in many parts of the world. Each fresh evaluation of the Pentecostal-Charismatic movement has brought an increased conviction that it is unscriptural and dangerous. - Author.