> For the complete documentation index, see [llms.txt](https://docs.nearbuilders.com/resources/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nearbuilders.com/resources/developer-onboarding/blockchain-operating-system-bos.md). # Blockchain Operating System (BOS) NEAR is the Blockchain Operating System The Blockchain Operating System (BOS) allows end users to quickly discover the possibilities of Web3 and gives developers the ability to code interfaces in a single environment and then fork components to build faster and more efficiently ## Examples of BOS Viewers In the recent months there has been a proliferation of BOS Viewers For all the BOS viewers view the BOS directory widget If you are interested in building your own BOS viewer, join the NEAR Social Developer telegram at [https://nearbuilders.com/tg-social ](https://nearbuilders.com/tg-social) NEAR OS (decentralized apps) The NEAR ecosystem is transitioning from traditional application development (Web/Mobile OS) hosted by centralized entities (CDNs, servers) to a more anti-fragile tech stack where the frontend of an application is hosted on the NEAR chain itself. Depending on their needs, most NEAR applications can be fully hosted on-chain using a tech stack pioneered by two projects in the ecosystem: NEAR Social and Web4. Core concepts include the storing of frontend code on chain and hosting frontends via gateways. Warning: this is a recent initiative and WIP! NEAR Social - and Web4 - and ## Read More Here --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.nearbuilders.com/resources/developer-onboarding/blockchain-operating-system-bos.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.