This document discusses electronic medical records (EMRs) and electronic health records (EHRs). EMRs contain patient medical data entered by doctors, while EHRs also include additional information like demographics and test results. EMRs are part of EHRs and are used for registration, billing, screenings, and scheduling. EHRs provide benefits like comprehensive patient histories and improved care, but also risks like security issues, hacking vulnerabilities, and data loss. Taking an accurate patient history is important for determining the cause of illness, and involves listening carefully and asking common sense questions. History taking is both an art and a science, requiring social and medical skills to build patient confidence and direct objective principles for maximum benefit.