System Design roadmap

Part A — Foundations (available)

Module	Tutorial
1	How to design a system
2	Quality attributes and trade-offs
3	Application architecture styles
4	Client, edge, and service path

Part B — Building blocks

Module	Tutorial	Status
5	Data storage	Ready
6	Caching	Ready
7	Messaging and async	Ready
8	APIs and communication	Ready
9	Observability and resilience	Ready

Part C — Classic systems

Module	Tutorial	Status
10	URL shortener	Ready
11	News feed / timeline	Ready
12	File / media upload	Ready
13	Search / autocomplete	Ready

Part D — Realtime

Module	Tutorial	Status
14	Realtime chat	Ready
15	Notifications and presence	Ready
16	Collaborative and streaming patterns	Ready
17	Capstone — collaboration board	Ready