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computer science

Sony

Sony 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 Sony rather than just read about it. In short: Sony Group Corporation, colloquially known as Sony, is a Japanese multinational conglomerate headquartered at the Sony City building in Minato, Tokyo. The Sony Group encompasses various businesses, including electronics, imaging and sensing (Sony Semiconductor Solutions), film and television (Sony Pictures Entertainment), music (Sony Music Group and Sony Music Entertainment Japan), video games (Sony Interactive Ente…

Sony — main illustration
Sony — illustration

Key takeaways

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

Reference excerpt

Sony Group Corporation, colloquially known as Sony, is a Japanese multinational conglomerate headquartered at the Sony City building in Minato, Tokyo. The Sony Group encompasses various businesses, including electronics, imaging and sensing (Sony Semiconductor Solutions), film and television (Sony Pictures Entertainment), music (Sony Music Group and Sony Music Entertainment Japan), video games (Sony Interactive Entertainment), and others. Sony was founded in 1946 as Tokyo Tsushin Kogyo K.K. by Masaru Ibuka and Akio Morita. In 1958, the company adopted the name Sony Corporation. Initially an electronics firm, it gained early recognition for products such as the TR-55 transistor radio and the CV-2000 home video tape recorder, contributing significantly to Japan's post-war economic recovery. After Ibuka's retirement in the 1970s, Morita served as chairman until 1994, overseeing Sony's rise as a global brand recognized for innovation in consumer electronics. Landmark products included the Trinitron color television, the Walkman portable audio player, and the co-development of the compact disc. Expanding beyond electronics, Sony acquired CBS Records in 1988 and Columbia Pictures Entertainment in 1989, while also entering the home video game console market with the launch of the PlayStation in 1994. In Japan, the company further diversified by establishing a financial services division in 2001, that would be turned into a separate company in September 2025, with the group maintaining 20% of the shares. In 2021, the company was renamed Sony Group Corporation as it transitioned into a holding company structure, with its electronics business continuing under the name Sony Corporation. In 2020, Sony held a 55% share of the global image sensor market, making it the largest image sensor manufacturer, the second largest camera manufacturer, a semiconductor sales leader, and the world's third-largest television manufacturer by sales. Although Sony is not part of a traditional keiretsu, it has historical ties to the Sumitomo Mitsui Financial Group, dating back to the 1950s when it relied exclusively on Mitsui Bank for financing. Sony is publicly traded on the Tokyo Stock Exchange (a component of the Nikkei 225 and TOPIX Core30 indices) and also maintains American depositary receipts on the New York Stock Exchange, where it has been listed since 1961. As of 2021, it ranked 88th on the Fortune Global 500 and 57th on the 2023 Forbes Global 2000 list.

History

Tokyo Tsushin Kogyo

Sony began in the wake of World War II. In 1946, Masaru Ibuka started an electronics shop in Shirokiya, a department store building in the Nihonbashi area of Tokyo. The company started with a capital of ¥190,000 and a total of eight employees. On 7 May 1946, Ibuka was joined by Akio Morita to establish a company called Tokyo Tsushin Kogyo (東京通信工業, Tōkyō Tsūshin Kōgyō; Tokyo Telecommunications Engineering Corporation). The company built Japan's first tape recorder, called the Type-G. In 1958, the company changed its name to "Sony".

Name Tokyo Tsushin Kogyo founders Morita and Ibuka realized that to achieve success and grow, their business had to expand to the global market, which required labeling their products with a short and easy brand name. While looking for a romanized name, they at first strongly considered using their initials, TTK. The primary reason they did not is that the railway company Tokyo Kyuko was known as TTK. The company occasionally used the syllabic acronym "Totsuko" in Japan, but during his visit to the United States, Morita discovered that Americans had trouble pronouncing that name. Another early name that was tried out for a while was "Tokyo Teletech" until Akio Morita discovered that there was an American company already using Teletech as a brand name. The name "Sony" was chosen for the brand as a mix of two words: one was the Latin word "sonus", which is the root of sonic and sound, and the other was "sonny", a common slang term used in 1950s America to call a young boy. In 1950s Japan, "sonny boys" was a loan word in Japanese, which connoted smart and presentable young men, which Akio Morita and Masaru Ibuka considered themselves to be. The first Sony-branded product, the TR-55 transistor radio, appeared in 1955, but the company name did not change to Sony until January 1958. At the time of the change, it was unusual for a Japanese company to use Roman letters to spell its name instead of writing it in kanji. The move was not without opposition: TTK's principal bank at the time, Mitsui, had strong feelings about the name. They pushed for a name such as Sony Electronic Industries, or Sony Teletech. Akio Morita was firm, however, as he did not want the company name tied to any particular industry. Eventually, both Ibuka and Mitsui Bank's chairman gave their approval.

Globalization

1950s–2000s

According to Schiffer, Sony's TR-63 radio "cracked open the U.S. market and launched the new industry of consumer microelectronics." By the mid-1950s, American teens had begun buying portable transistor radios in huge numbers, helping to propel the fledgling industry from an estimated 100,000 units in 1955 to 5 million units by the end of 1968. Sony co-founder Akio Morita founded Sony Corporation of America in 1960. In the process, he was struck by the mobility of employees between American companies, which was unheard of in Japan at that time. When he returned to Japan, he encouraged experienced, middle-aged employees of other companies to consider joining Sony. The company filled many positions in this manner, and inspired other Japanese companies to do the same. Moreover, Sony played a major role in the development of Japan as a powerful exporter during the 1960s, 1970s and 1980s, supplying the U.S. Military with bomb parts used in the Vietnam War. It also helped to significantly improve American perceptions of "made in Japan" products. Known for its production quality, Sony was able to charge above-market prices for its consumer electronics and resisted lowering prices.

… excerpt ends here. Continue reading the full article.

Illustrations

Sony illustration
Sony: Sony's first product was an electric rice cooker in the late 1940s.[22]
Sony's first product was an electric rice cooker in the late 1940s.[22]
Sony illustration
Sony illustration
Sony: A Sony TR-730 transistor radio made in Japan, c. 1960
A Sony TR-730 transistor radio made in Japan, c. 1960

Worked examples

Example 1 — a first encounter with Sony

Start with the simplest possible case. Write down what Sony 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 Sony 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 Sony 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 Sony

In research
Sony 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 Sony 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
Sony is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1950s initial public offerings, Audio software companies, Belgian Royal Warrant holders, so understanding it makes those chapters shorter.
In everyday life
Look for Sony 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 Sony in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Sony 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 Sony out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sony in simple terms?

Sony Group Corporation, colloquially known as Sony, is a Japanese multinational conglomerate headquartered at the Sony City building in Minato, Tokyo. The Sony Group encompasses various businesses, including electronics, imaging and sensing (Sony Semiconductor Solutions), film and television (Sony…

Why does Sony 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 Sony?

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 Sony.

Tags

  • 1950s initial public offerings
  • Audio software companies
  • Belgian Royal Warrant holders
  • Companies in the Nikkei 225
  • Companies listed on the New York Stock Exchange
  • Companies listed on the Tokyo Stock Exchange
  • Computer companies of Japan
  • Computer hardware companies
  • Computer storage companies
  • Computer systems companies
  • Conglomerate companies based in Tokyo
  • Conglomerate companies established in 1946

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