# Information

- [Fees](/information/fees.md): Polkadot and Kusama Asset Hub (former Statemint and Statemine) are system parachains on Polkadot and Kusama for creating and sending fungible and non-fungible (NFTs) tokens.
- [Existential Deposit](/information/existential-deposit.md): Most Substrate-based chains, including Polkadot, use an existential deposit (ED) to prevent small accounts from bloating the chain state.
- [Migrator](/information/migrator.md)