Christian? Or - is that a stupid question? I really don't know.
If you have a Barnes and Noble book store in the area , look up and thumb through a book called " the kingdom of the cults" , by Hank Hanegraaff and Walter Martin, though some of it is a bit biased ....
Mainline Christianity , the status quo , so to speak
Baptist , Methodist , Lutheran , Catholic , Christian , Reformed Church , Amish , Mennonites, Brethren [ the fruit of the reformation +/- ]
sorta betwixt and between [ not your average denominational body , not a cult or sect ] Church of God , Word of Faith , Four Square Gospel , Assemblies of God etc. [ the fruit of the reformation +/- ]
Cultic [ differ in one or more doctrines , with mainline christians ] Mormons , Jehovah's Witnesses , 7th Day Adventists' , Pentecostal [ Jesus only ] , Church of God
NonChristian , with Christian overtones : Christian Science , Bhai , New Age , Secular Humanism , Dianetics , etc.
NonChristian - children of Abraham , children of the book : Moslem , Jewish
nonchristian - heathen / pagan: Moonies , Khrisna's , buddhists , Shintist , Taoist , bhai , Hindu