User: Tell me whether these are metal bands or pop bands: Metallica, Iron Maiden, The Beatles, Coldplay, Slipknot, Slayer, One Direction, ABBA, The Beach Boys, Megadeth, Dream Theater, Machine Head, Queen, The Who, Bee Gees, Lamb Of God, BTS, Anthrax, System of a Down
Assistant: All of them are great bands! Let me help you understand which of those are metal bands and which are pop bands.

Metal bands:
- Metallica
- Iron Maiden
- Slipknot
- Slayer
- Megadeth
- Dream Theater
- Machine Head
- Lamb Of God
- Anthrax
- System of a Down

Pop bands:
- The Beatles
- Coldplay
- One Direction
- ABBA
- The Beach Boys
- Queen
- The Who
- Bee Gees
- BTS