Chronic Obstructive Airways Disease, COAD, Chronic Obstructive Pulmonary Disease, COPD, definition, etiology, pathophysiology, signs and symptoms, clinical presentation, pharmacotherapy, role of antibiotics and anti-cholinergics in COPD, management of COPD, treatment goals, common therapeutic problems associated with COPD, therapeutic options of each stage of COPD, etiopathogenesis, difference between emphysema and bronchitis, difference between asthma and COPD, cor pulmonale, risk factors for COPD, diagnosis, complications of COPD, stages of COPD, GOLD classification of COPD, management of acute COPD exacerbation