Look up PSU in Wiktionary, the free dictionary.

The initialism PSU often refers to a Power supply unit, or specifically a computer's Power supply unit (computer).

The PSU powers all the computer's main components. There are many different PSUs that can come with anywhere up to 1500 watts for a standard desktop computer. The PSU is also sometimes referred to as the most important part of a computer. Without a good, reliable PSU a computer cannot function properly, or it could damage the rest of the computer.

PSU may also refer to:

Universities:

• Portland State University
• Pangasinan State University
• Palawan State University
• Partido State University
• Pennsylvania State University
• Plymouth State University
• Pittsburg State University
• Plattsburgh State University
• Pembroke State University
• Prince of Songkla University
• Prince Sultan University
• Puntland State University
• Pacific States University

In entertainment:

• Public Surveillance Unit, a law enforcement organisation in the Judge Dredd comic strip
• Phantasy Star Universe, a persistent ORPG game by SEGA for PlayStation 2, Xbox 360 and PC
• Phantasy Star Universe: Ambition of the Illuminus, a persistent ORPG game by SEGA for PlayStation 2, Xbox 360 and PC.
• PlayStation Universe, a popular PlayStation website

In mathematics:

• Projective Special Unitary group - a mathematics projective unitary group
• Primary Sampling Unit - the highest level of sampling in a multi-stage or clustered design

Other Uses:

• Parti Socialiste Unifié (disambiguation), various organizations
• Passenger service unit
• Pilosebaceous unit
• Police Support Unit
• Polysulphone, plastic
• Port Security Unit, a U.S. Coast Guard expeditionary force protection unit.
• Power Supply Unit
• Power supply unit (computer)
• Practical salinity unit
• Prueba de Selección Universitaria, public university admission test in Chile
• Public Sector Undertaking, a term for Indian companies that have a majority stake from the Government of India

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