OSI Systems, Inc., through its subsidiaries, is a vertically integrated designer and manufacturer of specialized electronic systems and components for critical applications. The Company sells its products and provides related services in diversified markets, including homeland security, healthcare, defense and aerospace. The Company operates in three segments, which include Security, which provides security and inspection systems, turnkey security screening solutions and related services; Healthcare, which provides patient monitoring, diagnostic cardiology, anesthesia delivery and ventilation systems and defibrillators, and Optoelectronics and Manufacturing, which provides electronic components and electronic manufacturing services for the Security and Healthcare divisions, as well as to external original equipment manufacturer (OEM) customers and end users for applications in the defense, aerospace, medical and industrial markets, among others.