Usage share of operating systems

over 90% market sharearound 90% market sharedesktop operating system marketlargestMarket share of operating systemsoperating systemssecond most widely used desktop OSsoftware utilizationusage share of Linux distributions is low in comparison to other operating systemsused on
The usage share of operating systems is the percentage of computing devices that run each operating system at any particular time.wikipedia
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MacOS

Mac OS XMacOS X
In the personal computing platform area of smartphones and watches two systems dominate: Google's Android with over 2.7 billion users and Apple's iOS and macOS combined with over 1.3 billion users. Gartner includes Macs (running macOS) in PC sales numbers (but not e.g. iPads and Androids), and they individually had a slight increase in sales in 2015.
Within the market of desktop, laptop and home computers, and by web usage, it is the second most widely used desktop OS, after Microsoft Windows.

Mobile operating system

mobile platformsmobilemobile operating systems
By Q1 2018, mobile operating systems that can be found on smartphones, include Google's dominant Android (and variants) and Apple's iOS, which combined have an almost 100% market share.
Thus traditional desktop OS is now a minority used kind of OS; see usage share of operating systems.

Operating system

operating systemsOScomputer operating system
The usage share of operating systems is the percentage of computing devices that run each operating system at any particular time.
Although estimates suggest that Linux is used on only 1.82% of all "desktop" (or laptop) PCs, it has been widely adopted for use in servers and embedded systems such as cell phones.

Linux kernel

Linuxkernelkernels
Online usage of Linux kernel derivatives (Google systems + GNU/Linux) exceeds that of Windows.
Many desktop Linux distributions including the Linux kernel exist, but the usage share of Linux distributions is low in comparison to other operating systems.

Installed base

installed user baseuser baseinstall base
In 2015, eMarketer estimated, in the beginning of the year, that the tablet installed base would hit one billion for the first time (with China's use at 328 million, which Google Play doesn't serve or track, and US's second at 156 million).
Usage share of operating systems

Usage share of web browsers

usage sharebrowser market sharemarket share
Another source of market share of various operating systems is StatCounter basing its estimate on web use (although this may not be very accurate).
Usage share of operating systems

Net Applications

hitslink
Net Applications is known for being a provider of usage share statistics for web browsers and operating systems.

Comparison of operating systems

common operating systems
Comparison of operating systems
The article "Usage share of operating systems" provides a broader, and more general, comparison of operating systems that includes servers, mainframes and supercomputers.

Unix

Unix-likeUNIX-basedUX
Historically all kinds of Unix operating systems dominated, and in the end ultimately Linux remains.
Market share of operating systems

Computer

computerscomputer systemdigital computer
The usage share of operating systems is the percentage of computing devices that run each operating system at any particular time.

Computing platform

platformplatformssoftware platform
In the personal computing platform area of smartphones and watches two systems dominate: Google's Android with over 2.7 billion users and Apple's iOS and macOS combined with over 1.3 billion users.

Android (operating system)

AndroidAndroid operating systemAndroid OS
In the personal computing platform area of smartphones and watches two systems dominate: Google's Android with over 2.7 billion users and Apple's iOS and macOS combined with over 1.3 billion users. By Q1 2018, mobile operating systems that can be found on smartphones, include Google's dominant Android (and variants) and Apple's iOS, which combined have an almost 100% market share.

IOS

iPhone OSApple iOSiPhone
In the personal computing platform area of smartphones and watches two systems dominate: Google's Android with over 2.7 billion users and Apple's iOS and macOS combined with over 1.3 billion users. By Q1 2018, mobile operating systems that can be found on smartphones, include Google's dominant Android (and variants) and Apple's iOS, which combined have an almost 100% market share.

Internet

onlinethe Internetweb
For public Internet servers Linux is generally counted as dominant, powering about twice the number of hosts as Windows Server—which is trailed by many smaller players including traditional mainframe OSs.

Server (computing)

serverserversserver computer
For public Internet servers Linux is generally counted as dominant, powering about twice the number of hosts as Windows Server—which is trailed by many smaller players including traditional mainframe OSs.

Windows Server

Microsoft Windows ServerServerWindows Storage Server 2003
For public Internet servers Linux is generally counted as dominant, powering about twice the number of hosts as Windows Server—which is trailed by many smaller players including traditional mainframe OSs.

Mainframe computer

mainframemainframesmainframe computers
For public Internet servers Linux is generally counted as dominant, powering about twice the number of hosts as Windows Server—which is trailed by many smaller players including traditional mainframe OSs.

Supercomputer

high-performance computingsupercomputinghigh performance computing
The supercomputer field is completely dominated by Linux—with 100% of the TOP500 now running on this OS.

TOP500

fastest supercomputerstop 500fastest
The supercomputer field is completely dominated by Linux—with 100% of the TOP500 now running on this OS.

Gartner

Gartner, Inc.Gartner GroupGartner Research
According to Gartner, the following is the worldwide device shipments (referring to wholesale) by operating system, which includes smartphones, tablets, laptops and PCs together.

Wholesaling

wholesalewholesalerwholesalers
According to Gartner, the following is the worldwide device shipments (referring to wholesale) by operating system, which includes smartphones, tablets, laptops and PCs together.

Tablet computer

tabletstablettablet PC
According to Gartner, the following is the worldwide device shipments (referring to wholesale) by operating system, which includes smartphones, tablets, laptops and PCs together.

Laptop

laptop computerlaptopsnotebook computer
According to Gartner, the following is the worldwide device shipments (referring to wholesale) by operating system, which includes smartphones, tablets, laptops and PCs together. In the area of desktop and laptop computers, Microsoft Windows is generally above 75% in most markets, Apple's macOS at around 20%, Google's ChromeOS at about 5% and Linux at around 2%. All these figures vary somewhat in different markets, and depending on how they are gathered.

Personal computer

PCPCspersonal computers
According to Gartner, the following is the worldwide device shipments (referring to wholesale) by operating system, which includes smartphones, tablets, laptops and PCs together.

IPad

iPadsApple iPadApple iPads
Gartner includes Macs (running macOS) in PC sales numbers (but not e.g. iPads and Androids), and they individually had a slight increase in sales in 2015.