This document provides an overview and summary of chapters 1 and 2 from a textbook on health information systems and electronic health records. It discusses key topics from the chapters, including: 1. The scope and conceptual model of health information systems, including how systems capture data that can then be used for various purposes like clinical decision support, research, and public health. 2. How health information systems progress over time from foundational technologies to uses of data for learning, knowledge, and driving change. 3. Different uses of health information systems in organizational and community settings like hospitals, clinics, patients' homes, insurance companies, and public health organizations.