what denominations are Christians today?

There are many different denominations within Christianity today, including but not limited to:

1. Roman Catholic
2. Eastern Orthodox
3. Protestant (e.g. Baptist, Methodist, Lutheran, Presbyterian, Anglican/Episcopal, Pentecostal, etc.)
4. Adventist
5. Mormon
6. Jehovah's Witness
7. Evangelical
8. Charismatic
9. Non-denominational
10. Quaker
11. Mennonite
12. Amish
13. Salvation Army
14. Unitarian Universalist
15. Christian Science

These are just a few examples of the various denominations within Christianity. Each denomination has its own beliefs, practices, and traditions that distinguish it from others.