# Platform Engineering Fundamentals
All Platform Engineering Fundamentals notes →1 — The Evolution of Infrastructure Engineering
Traces infrastructure engineering from physical servers through virtualization, the rise of cloud computing, and infrastructure automation to the point where platform engineering became necessary.
2 — From System Administration to Platform Engineering
Contrasts traditional system administration with the DevOps revolution, cloud-native transformation, and the modern platform team model that emerged from both.
3 — DevOps, SRE, and Platform Engineering
Separates what DevOps, SRE, and Platform Engineering each solve, where their responsibilities and boundaries lie, and how the three disciplines work together in practice.
4 — Why Platform Engineering Exists
Grounds platform engineering's existence in scaling engineering organizations, reducing developer cognitive load, increasing velocity, and balancing standardization against flexibility.
5 — The Evolution of Developer Experience (DevEx)
Follows developer experience (DevEx) from early pain points through self-service engineering, the developer journey, and how developer happiness gets measured.