Windows CE in the context of Pocket PC 2002

The Jornada was a line of personal digital assistants or PDAs manufactured by Hewlett-Packard. The Jornada was a broad product line that included Palm-Size PCs, Handheld PCs, and Pocket PCs. The first model was the 820, released in 1998, and the last was the 928 model in 2002 when Compaq and HP merged. The Jornada line was then succeeded by the more popular iPAQ model PDAs. All Jornada models ran Microsoft Operating Systems that were based on Windows CE.

Windows Mobile 2003, originally codenamed "Ozone", is a member of the Windows Mobile family of mobile operating systems, released on June 23, 2003, succeeding Pocket PC 2002 and Smartphone 2002. It was the first Microsoft mobile OS to be called "Windows Mobile" and is based on Windows CE 4.2.

Windows Mobile is a discontinued mobile operating system developed by Microsoft for smartphones and personal digital assistants (PDA). Designed to be the portable equivalent of the Windows desktop OS in the emerging mobile/portable area, the operating system is built on top of Windows CE (later known as Windows Embedded Compact) and was originally released as Pocket PC 2000.

Microsoft introduced the Pocket PC keyboard-less PDAs in 2000, with Pocket PC 2000 being the software. It was based on version 3.0 of Windows CE, the operating system originally developed for the Handheld PC in 1996. The next versions were Pocket PC 2002 and Smartphone 2002, the latter of which would power a new category of keypad-based cell phone devices named Smartphone. With the release of Windows Mobile 2003, the software was rebranded to a single "Windows Mobile" for both Pocket PCs and Smartphones, and to connect the brand with its desktop counterpart. Support for SH-3 and MIPS processor architectures were dropped, focusing only on ARM. In the next major release, Windows Mobile 5.0 in 2005, Microsoft unified the separate developments of Pocket PC and Smartphone software into a single Windows Mobile codebase. Data could be synchronized with desktops using ActiveSync software, and later using Windows Mobile Device Center.

Internet Explorer (formerly Microsoft Internet Explorer and Windows Internet Explorer, commonly abbreviated as IE or MSIE) is a retired series of graphical web browsers developed by Microsoft that were used in the Windows line of operating systems. While IE has been discontinued on most Windows editions, it remains supported on certain editions of Windows, such as Windows 10 LTSB/LTSC. Starting in 1995, it was first released as part of the add-on package Plus! for Windows 95 that year. Later versions were available as free downloads or in-service packs and included in the original equipment manufacturer (OEM) service releases of Windows 95 and later versions of Windows. Microsoft spent over US$100 million per year on Internet Explorer in the late 1990s, with over 1,000 people involved in the project by 1999. In 2015, Microsoft Edge was released to succeed Internet Explorer 11 as Microsoft's primary web browser. New feature development for Internet Explorer was discontinued the following year year, and support for the browser officially ended on June 15, 2022, for Windows 10 Semi-Annual Channel (SAC) editions.

Internet Explorer was once the most widely used web browser, attaining a peak of 95% usage share by 2003. It has since fallen out of general use after retirement. This came after Microsoft used bundling to win the first browser war against Netscape, which was the dominant browser in the 1990s. Its usage share has since declined with the launches of Firefox (2004) and Google Chrome (2008) and with the growing popularity of mobile operating systems such as Android and iOS that do not support Internet Explorer. Microsoft Edge, IE's successor, first overtook Internet Explorer in terms of market share in November 2019. Versions of Internet Explorer for other operating systems have also been produced, including an Xbox 360 version called Internet Explorer for Xbox and for platforms Microsoft no longer supports: Internet Explorer for Mac and Internet Explorer for UNIX (Solaris and HP-UX), and an embedded OEM version called Pocket Internet Explorer, later rebranded Internet Explorer Mobile, made for Windows CE, Windows Phone, and, previously, based on Internet Explorer 7, for Windows Phone 7.

Pocket PC 2000 (marketed as Pocket PC) was the first member of the Windows Mobile family of mobile operating systems that was released on April 19, 2000, and was based on Windows CE 3.0. It is the successor to the operating system aboard Palm-size PCs; backwards compatibility was retained with such Palm-size PC applications. It was mainly intended for Pocket PC devices, however several Palm-size PC devices had the ability to be updated also. Furthermore, several Pocket PC 2000 phones were released (under the name Handheld PC 2000), although Microsoft's "Smartphone" hardware platform had not yet been established at that time.

Aesthetically, Pocket PC 2000 was meant to be similar in design to the then-current Windows 98 and Windows 2000 desktop operating systems, as well as the yet-to-be-released Windows Me (which was still in development at the time of Pocket PC 2000's release). It had multiple built-in applications, many of them similarly branded to match their desktop counterparts, such as Microsoft Reader, Microsoft Money, Pocket Internet Explorer, and Windows Media Player. A version of Microsoft Office called Pocket Office was also bundled and included Pocket Word, Pocket Excel and Pocket Outlook. Notes, a note-taking app saw its first release and would be supported by most later versions of Windows Mobile.

Windows Embedded Automotive (formerly Microsoft Auto, Windows CE for Automotive, Windows Automotive, and Windows Mobile for Automotive) is a discontinued operating system that was part of the Windows Embedded family and based on Windows CE for use on computer systems in automobiles. The operating system is developed by Microsoft through the Microsoft Automotive Business Unit that formed in August 1995. The first automotive product built by Microsoft's Automotive Business Unit debuted on December 4, 1998, as the AutoPC, and also includes Ford Sync, Kia Connect, and Blue&Me. Microsoft's Automotive Business Unit has built both the software platforms used for automotive devices as well as the devices themselves. The current focus is on the software platforms and includes two products, Microsoft Auto and Windows Automotive.

Windows Phone 7 (WP7) is the first release of the Windows Phone mobile client operating system, released worldwide on October 21, 2010, and in the United States on November 8, 2010. It runs on the Windows CE 6.0 kernel. It serves as the successor to Windows Mobile 6.5.

Windows Phone 7 was a complete overhaul of Microsoft's previous mobile Windows platforms. It was designed with the distinct flat-styled Metro interface. Due to shell changes, Windows Phone 7 cannot run Windows Mobile 6 applications. The first major update to Windows Phone 7 was Windows Phone 7.5, codenamed "Mango", which was globally released on September 27, 2011. Windows Phone 7.x was succeeded by Windows Phone 8, which was released on October 29, 2012; existing Windows Phone 7.x hardware could not upgrade to the incompatible Windows Phone 8 software. As a compromise to existing users, Microsoft released Windows Phone 7.8 on January 31, 2013, adding a few features backported from Windows Phone 8, such as a more customizable start screen and the new bootscreen.

Windows Phone (WP) is a discontinued mobile operating system 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.