I would like to know the difference between Search Engine Positioning and Optimization?

Not sure there is one. Search Engine Positioning is a somewhat new one to me. Sounds like someone just made up a term because ranking for "search engine optimization" is too hard.

I think, the aim of "search engine optimization" is to have a better search engine position. So it seems that these two have the same meaning and i agree to rob's comment.

SEO to improve SERP. I would agree with the rest of the members that these two are closely related.

I believe search engine marketing, search engine positioning and search engine optimization are essentially all in the same boat.. I know if you search google for "people optimization" I come positioned as the first result, is that search engine positioning?