Windows Phone
Windows Phone (WP) is a discontinued family of mobile operating systems developed by Microsoft for smartphones as the replacement successor to Windows Mobile and Zune. Windows Phone featured a new user interface derived from the Metro design language. Unlike Windows Mobile, it was primarily aimed at the consumer market rather than the enterprise market.

It was first launched in October 2010 with Windows Phone 7. Windows Phone 8 succeeded it in 2012, replacing the Windows CE-based kernel of Windows Phone 7 with the Windows NT kernel used by the PC versions of Windows (and, in particular, a large amount of internal components from Windows 8). Due to these changes, the OS was incompatible with all existing Windows Phone 7 devices, although it still supported apps originally developed for Windows Phone 7. In 2014, Microsoft released the Windows Phone 8.1 update, which introduced the Cortana virtual assistant, and Windows Runtime platform support to create cross-platform apps between Windows PCs and Windows Phone.

In 2015, Microsoft released Windows 10 Mobile, which promoted increased integration and unification with its PC counterpart, including the ability to connect devices to an external display or docking station to display a PC-like interface. Although Microsoft dropped the Windows Phone brand at this time in order to focus more on synergies with Windows 10 for PCs, it was still a continuation of the Windows Phone line from a technical standpoint, and updates were issued for selected Windows Phone 8.1 devices.

While Microsoft's investments in the platform were headlined by a major partnership with Nokia (whose Lumia series of smartphones, including the Lumia 520 in particular, would represent the majority of Windows Phone devices sold by 2013) and Microsoft's eventual acquisition of the company's mobile device business for just over US$7 billion (which included Nokia's then-CEO Stephen Elop joining Microsoft to lead its in-house mobile division), the duopoly of Android and iPhone remained the dominant platforms for smartphones, and interest in Windows Phone from app developers began to diminish by mid-decade. Microsoft laid off the Microsoft Mobile staff in 2016, after having taken a write-off of $7.6 billion on the acquired Nokia hardware assets, while market share sunk to 1% that year. Microsoft began to prioritize software development and integrations with Android and iOS instead, and ceased active development of Windows 10 Mobile in 2017.
Q920890
mobile operating system
Concept
Q2283
Microsoft
ORG
Q22645
smartphones
Concept
Q21207
Windows Mobile
Concept
Q229851
Zune
MISC
Q1148750
Metro design language
MISC
Q1318054
enterprise
Concept
Q1854343
Windows Phone 7
MISC
Q34825
Windows Phone 8
MEDIA
Q488244
Windows CE
MISC
Q486487
Windows NT
Concept
Q1406
Windows
Concept
Q5046
Windows 8
Concept
Q15282750
Windows Phone 8.1
MISC
Q15897235
Cortana
MISC
Q3467906
virtual assistant
Concept
Q400244
Windows Runtime
MISC
Q18845397
Windows 10 Mobile
MISC
Q18168774
PC counterpart
MISC
Q1233773
docking station
Concept
Q1418
Nokia
ORG
Q782736
Lumia series
Concept
Q7047993
Lumia 520
MISC
Q4917
US$
Concept
Q983111
Stephen Elop
PER
Q16538568
in-house mobile division
ORG
Q94
Android
MISC
Q2766
iPhone
MISC
Q5551716
write-off
Concept
Q4885200
Windows Phone
MISC
Q4885200
Windows Phone
MISC
Q4885200
Windows Phone
MISC
Q4885200
Windows Phone
MISC
Q4885200
Windows Phone
MISC
Q4885200
Windows Phone
MISC
Q4885200
Windows Phone
MISC
Q4885200
Windows Phone
MISC
Q4885200
Windows Phone
MISC
Q4885200
Windows Phone
MISC
Q4885200
Windows Phone
MISC
2010-10-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
October 2010
DATE
2012-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2012
DATE
2014-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2014
DATE
2015-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2015
DATE
2013-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2013
DATE
2016-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2016
DATE
2017-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
2017
DATE
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7
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8
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7
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8
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7
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7
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8.1
NUMBER
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10
NUMBER
+10^^http://www.w3.org/2001/XMLSchema#decimal
10
NUMBER
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8.1
NUMBER
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7
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7.6
NUMBER
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1
NUMBER
+10^^http://www.w3.org/2001/XMLSchema#decimal
10
NUMBER
subclass of
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follows
GUI toolkit or framework
developer
developer
platform
subclass of
subclass of
platform
instance of
manufacturer
operating system
operating system
manufacturer
part of the series
operating system
operating system