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4444 <p class="full mt0 mb4 mb4-xl lh-copy b">1 - Technology</p>
4545 <p class="full mt0 mb4 mb4-xl lh-copy">Technically, Urbit is two components: Urbit OS and Urbit ID.</p>
4646 <p class="full mt0 mb4 mb4-xl lh-copy">Both are completely <a class="bb" href="/understanding-urbit/urbit-os">open</a> <a class="bb" href="/understanding-urbit/urbit-id">source</a> and MIT licensed.</p>
47− <img class="full mb4" src="https://media.urbit.org/site/understanding-urbit/project-history/intro-os.svg"/>
47+ <img class="full w-100 mb4" src="https://media.urbit.org/site/understanding-urbit/uu-intro-2.svg"/>
4848 <p class="full mt0 mb4 mb4-xl lh-copy">Urbit OS is a new, carefully architected software stack: a VM, programming language and kernel designed to run software for an individual. </p>
4949 <p class="full mt0 mb4 mb4-xl lh-copy">Urbit OS is a program that runs on almost any cloud server, most laptops and many phones: anything with Unix and an internet connection. Urbit OS is completely sealed from the system it runs on, sort of like WASM or the JVM. We sometimes call it an ‘overlay OS’.</p>
5050 <p class="full mt0 mb4 mb4-xl lh-copy">In an Urbit world, each person has their own Urbit OS node, or ‘urbit’. Your urbit is secure and private to you and entirely under your control. When you want to connect with others, you connect to their urbit directly — rather than going through a centralized service. </p>
5151 <p class="full mt0 mb4 mb4-xl lh-copy">If you’re curious to dive even deeper into Urbit OS, feel free to <a class="bb" href="/understanding-urbit/urbit-os">skip ahead</a>.</p>
52− <img class="full mb4" src="https://media.urbit.org/site/understanding-urbit/project-history/intro-id.svg"/>
52+ <img class="full w-100 mb4" src="https://media.urbit.org/site/understanding-urbit/uu-intro-3.svg"/>
5353 <p class="full mt0 mb4 mb4-xl lh-copy">Urbit ID is an identity and authentication system specifically designed to work with Urbit OS. When you boot or log in to Urbit OS, you use your Urbit ID. </p>
5454 <p class="full mt0 mb4 mb4-xl lh-copy">Your Urbit ID is a short, memorable name (like </code>~ravmel-ropdyl</code>) that’s a username, network address and crypto wallet all in one. It’s registered on a blockchain, you own it with a key and no one can take it away from you. Urbit IDs are cryptographic property. </p>
5555 <p class="full mt0 mb4 mb4-xl lh-copy">Urbit IDs aren’t money, but they are scarce, so each one costs something. This means that when you meet a stranger on the Urbit network, they have some skin in the game and are less likely to be a bot or a spammer.</p>
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6262 <p class="full mt0 mb4 mb4-xl lh-copy">OS 1 is the first step toward a truly complete OS for a networked world. </p>
6363 <p class="full mt0 mb4 mb4-xl lh-copy">Over time, Urbit will grow into a system that can bring together all our different modes of communicating: chat, payments, documents, images, biometric data. We want individuals and their communities to be able to both control their software in fact, through the source code, and in action, through a simple interface.</p>
6464 <p class="full mt0 mb4 mb4-xl lh-copy">We want to leave behind a world of apps and services for one where we can bring everything together in one place. And, in doing so, ordinary users can create customized digital environments for their friends and communities.</p>
65− <img class="full mb4" src="https://storage.googleapis.com/media.urbit.org/site/understanding-urbit/intro/intro-0.jpg"/>
65+ <img class="full mb4" src="https://storage.googleapis.com/media.urbit.org/site/understanding-urbit/intro/intro-6.jpg"/>
6666 <p class="full mt0 mb4 mb4-xl lh-copy">To see how we’re going to get there, let’s walk through these two pieces of new technology individually, Urbit OS and Urbit ID. We’ll then talk about our vision for the future and how we’ll get there.</p>
6767 <p class="full mt0 mb4 mb4-xl lh-copy">For technical people, it’s important to note that Urbit as a stack is in no way required to be used together. Don’t like our client? Feel free to build your own. Just like the Urbit ID system? No problem — use it! Ultimately, we think that new technology is most likely to get adopted if it can provide a much, much better user experience. So that’s what we’re focussing on creating.</p>
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