Proof of Service is a mechanism in which nodes perform useful functions for the network and receive a reward for this, provided they hold a fixed collateral of coins.

A road map is a public development plan of a crypto project that describes, stage by stage, the goals, key milestones, and approximate timelines for achieving them. It helps to assess a project's direction and maturity.

Delegated Proof of Stake is a consensus algorithm in which coin holders vote to choose a limited number of trusted nodes that create blocks on behalf of the entire network.

ECDSA is a digital signature algorithm based on elliptic curves that allows the owner of a private key to confirm the right to dispose of coins. It is precisely what protects transactions in Bitcoin and many other networks.

An orphan block is a correctly or incorrectly formed block that the network ultimately rejected and did not include in the main chain. It does not make it into the blockchain's overall transaction history.