This document provides information about operating room personnel (ORPs) and various microorganisms. It defines ORPs as operating room technicians and explains their role in providing a controlled environment for surgery. It then lists and describes several major types of microorganisms that include protozoa, fungi, algae, viruses, and bacteria. The document provides some examples of diseases caused by different protozoan and fungal microorganisms. It notes that while most fungi have a symbiotic relationship with hosts, some fungi can cause infections in humans like candidiasis, oral thrush, athlete's foot, and aspergillosis.