Learn technical systems from first principles.
Each page connects prerequisites, mechanisms, examples, and failure cases. Start with how the internet works.
Example from a real page
Each concept page uses the same structure. This example is from Packets. It shows one mental model and one misconception.
From Packets
Postal letters
Each letter has an address and a body. The postal system moves letters, not whole novels as one inseparable object. If one letter is lost, you resend that letter.
Myth
Packets guarantee delivery.
Reality
IP packets are best-effort. Reliability, if needed, is built above them (for example TCP or QUIC) or by the application itself.
How every page is built
Each page uses progressive depth. Start with axioms. Then read intuition, formal shape, and edge cases.
- 01
Axioms & primitives
State why the idea exists. List the basic parts it uses.
- 02
Intuition
Give a clear picture before the formal definition.
- 03
Formal shape
Define the mechanisms with precise terms.
- 04
Edge cases
Show where the model fails or behaves in an unexpected way.
This is v0.1
This site is public while it grows. Version 0.1 covers internet fundamentals from packets to browsers. It also includes basic learning methods. More subjects will follow. The content will change over time.
- Published concepts
- 27
- Learning paths
- 2
- Niches with content
- 5
Choose a starting point
Follow the internet path in order. Or open the index and select a topic.