atom.sim vs NodeBook

A simulation of the anatomy of atoms. This app shows the first 18 atoms in 3d detail, provides info about the anatomy of these atoms and shows how empty an atom is. Ideal for students in mid school and high school.

NodeBook is a practical guide to Node.js for developers who want to understand the runtime, not just memorise APIs. Read published chapters in a focused native reader. Follow a structured path through the event loop, streams, buffers, networking, modules, processes, security, production systems, architecture, and the parts of Node.js that usually stay hidden behind frameworks. WHAT YOU CAN DO • Read every published free chapter without signing in • Keep your place and return to the next lesson • Bookmark useful chapters and save lessons for offline reading • Adjust text size, width, spacing, and reading theme • Follow the curriculum in a clear learning path • Explore Node Runtime Labs and their project maps • Practise production reasoning with Raw Mode previews • Sync eligible progress when signed in • Bring existing NodeBook access into the app with the same email • Contact NodeBook through a private support conversation • Get an optional notification when support replies BUILT FOR SERIOUS NODE.JS WORK NodeBook starts below the surface. The lessons connect JavaScript code to the runtime, operating system, protocols, memory, queues, files, processes, and production tradeoffs around it. It is useful whether you are learning backend development, preparing for a Node.js interview, or trying to make better architecture decisions at work. Published chapters and selected practice material are free. Some Runtime Labs and Raw Mode lessons require existing NodeBook access. Sign-in uses a one-time email code, so there is no password to remember. No ads. No noisy streak pressure. Just a careful place to learn how Node.js really works.