Dr. Mark Humphrys

School of Computing. Dublin City University.

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Mainframe / Server operating systems (multi-user)

Split between UNIX/Linux and Microsoft. Been that way for a long time.




Usage share of server operating systems for web servers only (not all servers/mainframes), 2015.
"Unix" family includes Linux.
From w3techs.com.




Server operating systems




Supercomputers



Feeds      w2mind.org

On Internet since 1987.