Zirconium (pronounced /z?r?ko?ni?m/ z?r-KOH-ni-?m) is a chemical element with the symbol Zr and atomic number 40. Its atomic mass is 91.224. It is a lustrous, grey-white, strong ...
http://en.wikipedia.org/wiki/Zirconium

Basic information, atomic structure, and isotopes.
http://www.chemicalelements.com/elements/zr.html

.zr is the former Internet country code top-level domain for Zaire. Because Zaire was renamed Democratic Republic of the Congo in 1997, .zr was phased out and .cd took its place.
http://en.wikipedia.org/wiki/.zr

The mandate of ZR Auto is to sell quality sports and exotic cars, at a fair price. ZR Auto Sales is a private, family owned business operating in the heart of western Canada.
http://www.zrauto.ca/

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http://www.zr.ru/