About
Nearly everything around you came down a line of machines you have never seen. This site shows you those lines.
What this is
Assembly Line is an open encyclopedia of how things are made. Each entry breaks one thing into stations in physical order. Each station names what goes in, and each of those inputs has its own entry, so you can keep walking until you reach something that came straight from the ground, the sea, the air, a plant or an animal.
There are 776 entries, 4,856 stations and 2,931 links between them today. Last updated 2026-11-03.
How entries are written
Entries are drafted with AI models working from the public sources listed at the foot of each page. A second model then checks each entry for factual errors and steps in the wrong order, and a script looks for every number in an entry inside those saved sources, and any figure it cannot find gets fixed or removed. Sources often say more about a material than about the factory floor, so some station descriptions are general ones, and the pages where this matters most say so at the foot. No human reviews each entry before it goes up, so mistakes will slip through. Check the sources for anything that matters, and use the report link at the foot of any page to tell us what is wrong.
Descriptions cover the main modern industrial route at the level of a factory tour. They are not instructions, and nothing here is health, safety or engineering advice.
Why it is free
Knowing how things are made should be common knowledge. Everything here is free to reuse under CC BY-SA 4.0, and the whole graph is available as open data.
Privacy
No accounts, advertising, or tracking cookies. We keep anonymous page counts, daily-game totals, and a daily count of which kind of site sent visitors here, such as a search engine. Your log and streak stay in your browser. Reports keep what you type in them, including an email address if you choose to give one.