Dr. Mark Humphrys

School of Computing. Dublin City University.

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PC operating systems (single user)

Microsoft dominance. Been that way for a long time.

Usage share of PC operating systems, 2016.
Microsoft dominance, but not quite monopoly.
Even 1 percent of these numbers is millions of machines.

Desktop Operating System Market Share, 2015, by marketshare.hitslink.com

Usage share of desktop operating systems up to 2015.
From StatCounter.com (and see their main site).

PC operating systems

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