Problem Oriented Medical Record (POMR) has been a standard of physicians’ record since it was introduced in 1968 by Dr. Lawrence Weed. However, many physicians are unaware of its principles and do not apply it in a correct way in clinical practice. This book will describe how to systematically write medical records for the diagnostic and therapeutic approaches. This book will cover principles and practice of POMR for care of inpatients and outpatients. The importance of medical records cannot be overemphasized, but many trainees are not educated for the right way of POMR. Thus, this book will provided the right concept of POMR and correct way of medical writing, compatible with the principles of POMR.