Olympus Corporation is engaged in medical, life science, industrial and imaging businesses. The Company operates in five segments. The Medical segment offers medical endoscopes, surgical endoscopes, ultrasound endoscopes and others. The Life and Industry segment provides biological microscopes, industrial microscopes, industrial endoscopes and non-destructive testing equipment. The Video segment provides digital cameras and sound recording machines. The Others segment is engaged in the provision of biomaterials, and the development of systems. The Common segment mainly involves in holding investment and financial investment. As of March 31, 2013, the Company had 174 subsidiaries and five associated companies.