PSU

PSU is an acronym that can refer to several entities or devices, depending on context. Notable uses include power supply units in electronics, universities such as Pennsylvania State University and Portland State University, and government-owned corporations known as public sector undertakings in India.

A power supply unit (PSU) is an electrical device that provides power to an electrical circuit. In consumer electronics and computers, a PSU converts alternating current (AC) from the mains into regulated direct current (DC) voltages that components require. It may be internal to devices or external. Key features include wattage rating, voltage rails, and efficiency ratings such as 80 Plus certification. Modern PSUs may be modular, allowing cables to detach, which improves cable management and airflow. Protection features include overvoltage, overcurrent, short-circuit, and thermal protection.

Pennsylvania State University, commonly known as Penn State, is a public land‑grant research university with campuses throughout Pennsylvania. Its flagship campus is in University Park. Founded in 1855, it operates multiple colleges and research institutes and is a member of the Big Ten Conference. The university is known for programs across engineering, sciences, business, and the liberal arts, and for a large student body and extensive research activity.

Portland State University is a public urban research university in Portland, Oregon. Founded in 1946, it offers undergraduate through doctoral programs across diverse disciplines and emphasizes community engagement, sustainability, and applied research. Its campus is situated near downtown Portland and serves a diverse, urban student population.

Public Sector Undertakings (PSUs) are government-owned corporations in India. Controlled by the central or state governments, they operate in sectors such as energy, mining, manufacturing, and services. They are governed by the Department of Public Enterprises and are subject to government oversight and reforms. Notable examples include Indian Oil Corporation, ONGC, BHEL, SAIL, and NTPC.