Blockchain is a multifunctional, multi-level information technology designed for reliable accounting of various assets. Potentially, this technology covers all spheres of economic activity without exception and has many areas of application. Among them are: finance and economics; operations with tangible and intangible assets; accounting in state and private organizations, as well as mixed-type organizations. In essence, blockchain is a new organizational paradigm for coordinating any kind of human activity. Perhaps it is even our future—something useful to learn about already today. The book is intended for those interested in financial instruments and technological innovations, especially crypto-technologies.