Learning HubWITH UI

FOUR SUBJECTS. ONE STARTING POINT.

Don't just read it.
Understand it.

Trace an algorithm. Design an object. Explore a system.
Connect the ideas by learning through interaction.

Find your next subject Not sure where to start?

CHOOSE YOUR FOCUS

What do you want to understand?

Each subject opens in this tab.
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01 / DSA

Data structures
& algorithms

Make the invisible steps visible. Follow how data moves and how an algorithm reaches its answer.

  • Step-by-step exploration
  • Problem-solving practice
Explore algorithms
02 / LLD

Low-level
design

Turn requirements into working objects. Explore responsibilities, relationships, and real design decisions.

  • Interactive application modules
  • Design patterns & diagrams
Explore object design
03 / HLD

High-level
design

Zoom out from code to systems. Change the inputs and explore requests, capacity, and architectural trade-offs.

  • System simulations
  • Capacity & reliability trade-offs
Explore systems
04 / FOUNDATIONS

CS
fundamentals

Build the mental models behind the code. Connect operating systems, networks, databases, and programming concepts.

  • Concepts with visual explanations
  • A foundation for every other subject
Explore fundamentals

A LITTLE DIRECTION

New here?
Start with the foundations.

A suggested order, not a requirement.
Jump into whichever subject you need today.

  1. 01
    CS fundamentals →

    Understand what runs underneath your code.

  2. 02
    Data structures & algorithms →

    Learn to reason about problems and efficiency.

  3. 03
    Low-level design →

    Organize behavior into maintainable objects.

  4. 04
    High-level design →

    Connect components and explore system trade-offs.

One doorway. Four independent learning apps.

This hub connects the existing projects; it doesn't combine their accounts, themes, or progress. Any saved learning state stays with its original app.