Blockchains
Solana (network) — a fast platform for tokens and apps
Solana is a fast, cheap network for tokens, NFTs and apps. How staked coins secure it, why the Proof of History "clock" is needed, what programs are written in, how to issue your own token, and what about the network's reliability.
Network
XRP Ledger (network) — a fast network for settlements and tokens
The XRP Ledger is a network for fast, cheap settlements with an unusual security model: not mining and not staking, but the agreement of trusted servers. What is built into the network (an exchange, tokens, NFTs), how it is programmed, and how the network differs from the coin XRP and the company Ripple.
Network
Ethereum (network) — a platform for tokens and apps
The Ethereum network is a platform on top of which tokens, stablecoins and NFTs are issued and apps are built. How Proof of Stake secures it, what smart contracts are written in, and how the network differs from the coin ETH.