OSI Systems, Inc. operates in three segments, namely Security, Healthcare, and Optoelectronics and Manufacturing, and designs and manufactures electronic systems and components for various markets worldwide. The Security segment offers security screening solutions and systems for the detection of radiation, explosives, and narcotics, among others. Meanwhile, the Healthcare segment provides diagnostic cardiology systems and patient monitoring products, while the Optoelectronics and Manufacturing segment offers optoelectronic devices, electronics manufacturing services, laser-based remote sensing devices, solid-state laser products, and more.