OSIsoft, LLC is a manufacturer of application software for real-time data management, called the PI System. Founded in 1980, OSIsoft is privately held and headquartered in San Leandro, California. OSIsoft develops and supports software used to capture, process, analyze, and store any form of real-time data. OSIsofts target markets include: oil and gas; chemicals and petrochemicals; materials, mines, metals and metallurgy; power and utilities; pulp and paper; pharmaceuticals, food and life sciences; critical facilities, data centers and IT; and federal. The PI System is a suite of software products that are used for data collection, historicizing, finding, analyzing, delivering, and visualizing. It is marketed as an enterprise infrastructure for management of real-time data and events. The term PI System is often used to refer to the PI Server but the two are not the same. The PI System refers to all OSIsoft software products whereas the PI Server is the core product of the PI System.