Fintech is an industry that brings together companies that use technology and innovation to transform financial services. It includes payment services, neobanks, and also blockchain-based solutions.

A fork in a blockchain is a change to the rules by which a block is recognized as valid. There are soft forks and hard forks, which affect the unity of the network in different ways.

Freicoin is a cryptocurrency built around the economic idea of money with a storage fee. It is based on the concept of "free money" by economist Silvio Gesell.

Difficulty is a network parameter that governs how hard it is to find a new block. It automatically adjusts to the network's total power, keeping the block issuance time stable.

A smart contract is a software algorithm on a blockchain that automatically executes the terms of an agreement. It works without intermediaries and triggers only when the specified conditions are met.