What does PSU stand for?

MLA style: "PSU." Acronym Finder . 2013. AcronymFinder.com 21 May. 2013 http://www.acronymfinder.com/Photo_Synthetic-Unit-(PSU).html
Chicago style: Acronym Finder . S.v. "PSU." Retrieved May 21 2013 from http://www.acronymfinder.com/Photo_Synthetic-Unit-(PSU).html
APA style: PSU. (n.d.) Acronym Finder. (2013). Retrieved May 21 2013 from http://www.acronymfinder.com/Photo_Synthetic-Unit-(PSU).html

Photo-Synthetic Unit

This definition appears very rarely and is found in the following Acronym Finder categories:

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