This document summarizes several respiratory system diseases including chronic obstructive pulmonary disease (COPD) and chronic restrictive pulmonary disease. It describes the four entities that comprise COPD - bronchial asthma, chronic bronchitis, emphysema, and bronchiectasis. For each condition, it outlines characteristics, pathologic findings, and types. It also discusses several occupational lung diseases that fall under chronic restrictive pulmonary disease, including coal workers' pneumoconiosis, silicosis, and asbestosis.