This document defines what a pest is and discusses reasons for pest control. It describes pest management systems and their goals of prevention, suppression, and eradication. Various types of pests are outlined including insects, arthropods, microbes, weeds, and mollusks. Specific pests like cockroaches, rats, mice, silverfish, and house flies are described along with control methods. The effects of pest infestation and control measures including insecticides, fumigation, and proper drainage are summarized.