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Skype Technologies

Skype Technologies 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 Skype Technologies rather than just read about it. In short: Skype Technologies (also known as Skype Software, Skype Communications, Skype Inc., and Skype Limited) was a telecommunications company headquartered in Luxembourg City, whose chief business was the development and marketing of the video chat and instant messaging computer software program Skype, and various Internet telephony services associated with it. Microsoft purchased the company in 2011, and it had since the…

Skype Technologies — main illustration
Skype Technologies — illustration

Key takeaways

  • Skype Technologies 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 Skype Technologies to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Skype Technologies from memory before moving on to harder problems.

Reference excerpt

Skype Technologies (also known as Skype Software, Skype Communications, Skype Inc., and Skype Limited) was a telecommunications company headquartered in Luxembourg City, whose chief business was the development and marketing of the video chat and instant messaging computer software program Skype, and various Internet telephony services associated with it. Microsoft purchased the company in 2011, and it had since then operated as their wholly owned subsidiary; as of 2016, it was operating as part of Microsoft's Office Product Group. The company was a société à responsabilité limitée, or SARL, equivalent to an American limited liability company. Skype, a voice over IP (VoIP) service, was first released in 2003 as a way to make free computer-to-computer calls, or reduced-rate calls from a computer to telephones. Support for paid services such as calling landline/mobile phones from Skype (formerly called SkypeOut), allowing landlines and mobile phones to call Skype (formerly called SkypeIn and now Skype Number), and voice messaging generated the majority of Skype's revenue. eBay acquired Skype Technologies S.A. in September 2005 and in April 2009 announced plans to spin it off in a 2010 initial public offering (IPO). In September 2009, Silver Lake, Andreessen Horowitz, and the Canada Pension Plan Investment Board announced the acquisition of 65% of Skype for $1.9 billion from eBay, valuing the business at $2.75 billion. Skype was acquired by Microsoft in May 2011 for $8.5 billion (~$11.7 billion in 2024). As of 2010, Skype was available in 27 languages and had 660 million worldwide users, an average of over 100 million active each month, and had faced challenges to its intellectual property amid political concerns by governments wishing to control telecommunications systems within their borders. In February 2025, Microsoft announced the shutdown of Skype on 5 May 2025, with the company being dissolved along with it.

History Skype was founded in 2003 by Janus Friis from Denmark and Niklas Zennström from Sweden, having its headquarters in Luxembourg with offices now in Berlin, Frankfurt, Tallinn, Tartu, Stockholm, London, Palo Alto, Prague, and Redmond, Washington. The Skype software was originally developed by Estonians Ahti Heinla, Priit Kasesalu, and Jaan Tallinn, who together with Janus Friis and Niklas Zennström were also behind the peer-to-peer file sharing software Kazaa. In April 2003, Skype.com and Skype.net domain names were registered. In August 2003, the first public beta version was released. One of the initial names for the project was "Sky peer-to-peer", which was then abbreviated to "Skyper". However, some of the domain names associated with "Skyper" were already taken. Dropping the final "r" left the current title "Skype", for which domain names were available.

In September 2005, SkypeOut was banned in China. In October of the same year, eBay purchased Skype for $2.6 billion. (In 2011, the Ars Technica estimated the purchase price at $3.1 billion, not $2.6 billion.) In December 2005, videotelephony was introduced.

In April 2006, the number of registered users reached 100 million. In October 2006, Skype 2.0 for Mac was released, the first full release of Skype with video for Macintosh, and in December, Skype announced a new pricing structure, with connection fees for all SkypeOut calls. Skype 3.0 for Windows was released. In 2006, a feature called "Skypecasting" was introduced as a beta. It allowed recordings of Skype voice over IP voice calls and teleconferences to be used as podcasts. Skypecasting remained in beta until it was discontinued on 1 September 2008. Skypecasts hosted public conference calls for up to 100 people at a time. Unlike ordinary Skype p2p conference calls, Skypecasts supported moderation features suitable for panel discussions, lectures, and town hall forums. Skype operated a directory of public Skypecasts. Throughout 2007, updates (3.1, 3.2, and 3.5) added new features including Skype Find, Skype Prime, Send Money (which allowed users to send money via PayPal from one Skype user to another), video in mood, inclusion of video content in chat, call transfer to another person or a group, and auto-redial. Skype 2.7.0.49 (beta) for Mac OS X released adding availability of contacts in the Mac Address Book to the Skype contact list, auto redial, contact groups, public chat creation, and an in-window volume slider in the call window. During several days in August, Skype users were unable to connect to full Skype network in many countries because of a Skype system-wide crash which was the result of exceptional number of logins after a Windows patch reboot ("Patch Tuesday"). In November, there was controversy when it was announced that users allocated certain London 020 numbers (specifically those beginning '7870') would lose them, after negotiations with the provider of this batch of numbers broke down. By early 2008, the tumultuous ownership relations between the founders and eBay had resulted in significant leadership churn, with a succession of Skype presidents including Niklas Zennström, Rajiv Dutta, Alex Kazim, Niklas Zennström (again), and Henry Gomez, all holding that title at various points between 2005 and 2007. The business had failed to meet certain earn-out targets, growth was decelerating, product development had slowed significantly, and in October 2007 eBay took a $1.4 billion 'impairment' on the value of Skype, admitting it had overpaid, and now valuing the company at about $2.7 billion. In October 2008, analysis revealed TOM-skype — the Chinese version of Skype run by TOM Online — sent content of text messages and encryption keys to monitoring servers.

… excerpt ends here. Continue reading the full article.

Illustrations

Skype Technologies illustration
Skype Technologies: The Skype logo from 2006 to 2012
The Skype logo from 2006 to 2012
Skype Technologies: A Skype phone manufactured by SMC Networks (c. 2006)
A Skype phone manufactured by SMC Networks (c. 2006)
Skype Technologies: Skype lounge at CES 2012
Skype lounge at CES 2012
Skype Technologies: Skype Logo 2019-2025
Skype Logo 2019-2025

Worked examples

Example 1 — a first encounter with Skype Technologies

Start with the simplest possible case. Write down what Skype Technologies 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 Skype Technologies 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 Skype Technologies 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 Skype Technologies

In research
Skype Technologies 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 Skype Technologies 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
Skype Technologies is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2003 establishments in Luxembourg, 2005 mergers and acquisitions, 2011 mergers and acquisitions, so understanding it makes those chapters shorter.
In everyday life
Look for Skype Technologies 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.
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How to study Skype Technologies in 20 minutes

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

Frequently asked questions

What is Skype Technologies in simple terms?

Skype Technologies (also known as Skype Software, Skype Communications, Skype Inc., and Skype Limited) was a telecommunications company headquartered in Luxembourg City, whose chief business was the development and marketing of the video chat and instant messaging computer software program Skype, a…

Why does Skype Technologies 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 Skype Technologies?

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 Skype Technologies.

Tags

  • 2003 establishments in Luxembourg
  • 2005 mergers and acquisitions
  • 2011 mergers and acquisitions
  • 2020s disestablishments in Luxembourg
  • Companies based in Luxembourg City
  • EBay acquisitions
  • Microsoft acquisitions
  • Microsoft divisions
  • Skype
  • Skype people
  • Software companies established in 2003
  • Software companies of Luxembourg

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