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This is from a local BBS.  I am in no way claiming ownership to this document.  This is put here for a non-profit cause -- to benefit the public.  If you have objections about the copyright of this document, please direct it to thanks!

What does the name "WD-40" stand for?
 "WD-40 literally stands for Water Displacement, 40th attempt. That's the
 name straight out of the lab book used by the chemist who developed WD-40
 back in 1953. The chemist, Norm Larsen, was attempting to concoct a formula
 to prevent corrosion-a task which is done by displacing water. Norm's
 persistence paid off when he perfected the formula on his 40th try. Please
 see our history section for more information."

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