"Their China unit market share was 63% and seat market share 67%" The sentence is a description for Boeing. I am confused about the meaning of "unit market share" and "seat market share". I found an entry for "unit market share" on Google(I hope it is correct): Unit market share: The units sold by a particular company as a percentage of total market sales, measured in the same units. Unit market share (%) = 100 * Unit sales(#) / Total Market Unit Sales(#) Source: https://www.boundless.com/marketing/textbooks/boundless-marketing-textbook/the-marketing-environment-3/internal-factors-30/calculating-market-share-161-4046/ But I couldn't find the explanation for "seat market share". Do you have any idea of it? Thanks a lot!