This repository contains an educational booklet on machine learning systems design written by Chip Huyen. It covers four main steps of ML system development: project setup, data pipeline, modeling (selecting, training, debugging), and serving (testing, deploying, maintaining). The content includes practical resources, case studies from engineers at major tech companies, and 27 open-ended interview questions. It serves as introductory material to ML systems design, with a more comprehensive updated book available separately.