computer science

Microsoft Windows

Microsoft Windows is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Microsoft Windows rather than just read about it. In short: Windows is a proprietary operating system developed by Microsoft. Windows is grouped into families that cater to particular sectors of the computing industry – Windows for personal computers, Windows Server for servers, and Windows IoT for embedded systems.

Key takeaways

Microsoft Windows belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Microsoft Windows to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Microsoft Windows from memory before moving on to harder problems.

Reference excerpt

Windows is a proprietary operating system developed by Microsoft. Windows is grouped into families that cater to particular sectors of the computing industry – Windows for personal computers, Windows Server for servers, and Windows IoT for embedded systems. Windows itself is further grouped into editions that cater to different users – Home for home users, Professional for advanced users, Education for schools, and Enterprise for corporations. Windows is sold both as a consumer retail product and to computer manufacturers, who bundle and distribute it with their systems. The first version of Windows, Windows 1.0, was released on November 20, 1985 as a graphical operating system shell for MS-DOS in response to growing interest in graphical user interfaces (GUIs). The name Windows is a reference to the windowing system in GUIs. The 1990 release of Windows 3.0 catapulted its market success and led to the launch of various other product families, including the (now-defunct) Windows Mobile, Windows Phone, and Windows CE/Embedded Compact. Windows is the most popular desktop operating system in the world, with a 71% market share as of July 2026, and the second-most popular operating system overall, behind Android. As of July 2026, Windows 11 is the most used desktop version of Windows, with a market share of 69%.

Product line All members of the Windows product family are, as of 2026, based on Windows NT. The first version of Windows in that product line, Windows NT 3.1, was intended for server computing and corporate workstations. It now consists of four sub-families that tend to be released almost simultaneously and share the same kernel.

Windows (unqualified): For a consumer or corporate workstation or tablet. The latest version is Windows 11. Its main competitors are macOS by Apple and Linux for personal computers and iPadOS and Android for tablets (cf. Usage share of operating systems § Market share by category). Of note: "Windows" refers to both the overall product line and this sub-family of it. Windows Server: For a server computer. The latest version is Windows Server 2025. Unlike its client sibling, it has adopted a strong naming scheme. The main competitor of this family is Linux. (cf. Usage share of operating systems § Market share by category) Windows IoT (previously Windows Embedded): For IoT and embedded computers. The latest version is Windows 11 IoT Enterprise. Like Windows Server, the main competitor of this family is Linux. (cf. Usage share of operating systems § Market share by category) Windows PE: A lightweight version of Windows designed to operate as a live operating system, used for installing Windows on bare-metal computers (especially on many at once), recovery, or troubleshooting purposes. The latest version is Windows PE, version 10.0. These top-level Windows families are no longer actively developed:

MS-DOS-based versions of Windows, including Windows 1.0, Windows 2.0, Windows 3.x, and Windows 9x: The original top-level family of Windows prior to Windows NT, aimed at consumers. These versions used a monolithic kernel, with later versions in the family since Windows 3.0 having their own kernel. The last version was Windows Me; the family was discontinued after the release of Windows XP, with all consumer-oriented versions of Windows afterwards being based on the Windows NT kernel. Windows Mobile: Windows Mobile was a mobile phone and PDA operating system and the predecessor to Windows Phone. The first version was Pocket PC 2000; the third version, Windows Mobile 2003, was the first version to adopt the Windows Mobile trademark. The last published version was Windows Mobile 6.5. Windows Phone: Sold only to smartphone manufacturers. The first version was Windows Phone 7, followed by Windows Phone 8 and Windows Phone 8.1. It was succeeded by Windows 10 Mobile, which is also defunct. Windows Embedded Compact: Most commonly known by its former name, Windows CE, it is a hybrid kernel operating system optimized for low power and memory systems, with OEMs able to modify the UI to suit their needs. The final version was Windows Embedded Compact 2013, and it is succeeded by Windows IoT.

History

The term Windows collectively describes any or all of several generations of Microsoft operating system products. These products are generally categorized as follows:

Early versions

… excerpt ends here. Continue reading the full article.

Illustrations

Windows logo (1995–2001)

A variation of the 2001–06 Windows logo from 2003 using the Segoe typeface instead of the Franklin Gothic typeface. This variation was mainly used for branding purposes.

Windows logo (2006–12)

Worked examples

Example 1 — a first encounter with Microsoft Windows

Start with the simplest possible case. Write down what Microsoft Windows claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Microsoft Windows before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Microsoft Windows ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Microsoft Windows

In research: Microsoft Windows appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Microsoft Windows in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Microsoft Windows is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1985 establishments in the United States, 1985 software, Computer-related introductions in 1985, so understanding it makes those chapters shorter.
In everyday life: Look for Microsoft Windows outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Microsoft Windows in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Microsoft Windows means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Microsoft Windows out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Microsoft Windows in simple terms?

Why does Microsoft Windows matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Microsoft Windows?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Microsoft Windows.