MKS Instruments, Inc. provides instruments, systems, subsystems and process control solutions to measure, control, power, monitor, and analyze parameters of manufacturing processes to improve process performance and productivity for its customers. The company is headquartered in Andover, Massachusetts and currently employs 10,000 full-time employees. The firm's segments include Vacuum Solutions Division (VSD), Photonics Solutions Division (PSD), and Materials Solutions Division (MSD). The VSD segment delivers technology solutions to edge semiconductor manufacturing, electronics and packaging and specialty industrial applications. VSD products are derived from its core competencies 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. The PSD segment provides a range of instruments, components, and subsystems to semiconductor manufacturing, electronics and packaging and specialty industrial applications. The MSD segment develops process and manufacturing technologies for advanced surface modification, electroless and electrolytic plating, and surface finishing.