Charles Arthur writing for The Guardian about the 80% Android market share:

But market share is a measure of sales. Only in the specific case where the market is saturated – that is, everyone who wants a Widget has one, so that now the market is essentially just replacements – does market share probably tally with “installed base”.

If you have ever had any problems understanding market concepts like market share, installed bas, sell-in, sell-through and selling vs. shipping this is the article for you.

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