There are 7 key innovations that make the Solana network possible: Proof of History (POH)— a clock before consensus; Tower BFT — a PoH-optimized version of PBFT; Turbine — a block propagation protocol; Gulf Stream — Mempool-less transaction forwarding protocol; Pipeline VM— Parallel smart contracts run-time; Cloudbreak — Horizontally-Scaled Accounts Database; and Replicators — Distributed ledger store