MKS Instruments is a provider of instruments, systems, subsystems and process control solutions. Co. has three segments: Vacuum and Analysis, which provides instruments, components and subsystems in pressure measurement and control, flow measurement and control, gas and vapor delivery, gas composition analysis, electronic control technology, reactive gas generation and delivery, power generation and delivery and vacuum technology; Light and Motion, which provides instruments, components and subsystems in lasers, photonics, optics, temperature sensing, precision motion control and vibration control; and Equipment and Solutions, which provides a range of laser-based system and test products.