By marketing role
Microsoft, the developer of Windows, has registered several trademarks each of which denote a family of Windows operating systems that target a specific sector of the computing industry. As of 2014, the following Windows families are being actively developed:- Windows NT: Started as a family of operating system with Windows NT 3.1, an operating system for server computers and workstations.
It now consists of three operating system subfamilies that are released
almost at the same time and share the same kernel. It is almost
impossible for someone unfamiliar with the subject to identify the
members of this family by name because they do not adhere to any
specific rule; e.g. Windows Vista, Windows 7, Windows 8/8.1 and Windows RT are members of this family but Windows 3.1 is not.
- Windows: The operating system for mainstream personal computers, tablets and smartphones. The latest version is Windows 10. The main competitor of this family is macOS by Apple Inc. for personal computers and Android for mobile devices (c.f. Usage share of operating systems § Market share by category).
- Windows Server: The operating system for server computers. The latest version is Windows Server 2016. Unlike its clients sibling, it has adopted a strong naming scheme. The main competitor of this family is Linux. (c.f. Usage share of operating systems § Market share by category)
- Windows PE: A lightweight version of its Windows sibling meant to operate as a live operating system, used for installing Windows on bare-metal computers (especially on many computers at once), recovery or troubleshooting purposes. The latest version is Windows PE 10.0.10586.0.
- Windows Embedded: Initially, Microsoft developed Windows CE as a general-purpose operating system for every device that was too resource-limited to be called a full-fledged computer. Eventually, however, Windows CE was renamed Windows Embedded Compact and was folded under Windows Compact trademark which also consists of Windows Embedded Industry, Windows Embedded Professional, Windows Embedded Standard, Windows Embedded Handheld and Windows Embedded Automotive.[7]
- Windows 9x: An operating system that targeted consumers market. Discontinued because of suboptimal performance. (PC World called its last version, Windows ME, one of the worst products of all times.)[8] Microsoft now caters to the consumers market with Windows NT.
- Windows Mobile: The predecessor to Windows Phone, it was a mobile phone operating system. The first version was called Pocket PC 2000; the third version, Windows Mobile 2003 is the first version to adopt the Windows Mobile trademark. The last version is Windows Mobile 6.5.
- Windows Phone: An operating system sold only to manufacturers of smartphones. The first version was Windows Phone 7, followed by Windows Phone 8, and the last version Windows Phone 8.1. It was succeeded by Windows 10 Mobile
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