Second, Zero is 'meta-consistent'. zChain enables Zero to act as a central repository for credentials and data stored in existing web3 systems and protocols. Zero does not aim to compete with traditional blockchains, and is designed to integrate both agent-centric and data-centric approaches into a single application stack called the Zero Open System (or zOS for short). For instance, while financial transactions are well suited for a shared global ledger like Ethereum, global consensus is computationally inefficient for use-cases such as sending private messages between a limited number of peers. Zero's 'meta-consistent' approach enables developers to use both 'agent-centric' and 'data-centric' approaches depending on the use-case, in a way that still prioritizes speed, security and decentralization. Zero can be thought of as the ultimate abstraction layer for the web3 ecosystem, not dissimilar to how desktop operating systems once provided a novel interface for command prompts, or how the browser provided a visual way to explore the world wide web.