science

Johnson & Johnson

Johnson & Johnson is a 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 Johnson & Johnson rather than just read about it. In short: Johnson & Johnson (J&J) is an American multinational pharmaceutical, biotechnology, and medical technologies corporation headquartered in New Brunswick, New Jersey. The company is ranked No. 42 on the 2026 Fortune 500 list of the largest United States corporations.

Key takeaways

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

Reference excerpt

Johnson & Johnson (J&J) is an American multinational pharmaceutical, biotechnology, and medical technologies corporation headquartered in New Brunswick, New Jersey. The company is ranked No. 42 on the 2026 Fortune 500 list of the largest United States corporations. In 2026, the company was ranked 43rd in the Forbes Global 2000. Along with Microsoft, Johnson & Johnson is one of only two U.S.-based companies that has a prime credit rating of AAA from S&P Global.

History

1873–1885: Before Johnson & Johnson Robert Wood Johnson began his professional training at age 16 as a pharmaceutical apprentice at an apothecary run by his mother's cousin, James G. Wood, in Poughkeepsie, New York. Johnson co-founded his own company with George J. Seabury in 1873. The New York-based Seabury & Johnson became known for its medicated plasters. Robert Wood Johnson represented the company at the Centennial Exposition in 1876. There he heard Joseph Lister's explanation of a new procedure: antiseptic surgery. Johnson parted ways with his business partner Seabury in 1885.

1886: Founding of Johnson & Johnson

Robert Wood Johnson joined his brothers, James Wood Johnson and Edward Mead Johnson, and created a line of ready-to-use sterile surgical dressings in 1886. They founded Johnson & Johnson in 1886 with 14 employees, eight women and six men. Johnson & Johnson opened its first factory building in the old Janeway and Carpenter factory on Neilson Street in New Brunswick, New Jersey. They manufactured sterile surgical supplies, household products, and medical guides. Those products initially featured a logo that resembled the signature of James Wood Johnson. Robert Wood Johnson served as the first president of the company.

1887–1942: Early history

… excerpt ends here. Continue reading the full article.

Illustrations

Early corrosive sublimate cotton packaging with the signature logo, c. 1887

Worked examples

Example 1 — a first encounter with Johnson & Johnson

Start with the simplest possible case. Write down what Johnson & Johnson claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In 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 Johnson & Johnson 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 Johnson & Johnson 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 Johnson & Johnson

In research: Johnson & Johnson appears in 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 Johnson & Johnson 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: Johnson & Johnson is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1886 establishments in New Jersey, 1940s initial public offerings, American companies established in 1886, so understanding it makes those chapters shorter.
In everyday life: Look for Johnson & Johnson 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 Johnson & Johnson in 20 minutes

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

Frequently asked questions

What is Johnson & Johnson in simple terms?

Why does Johnson & Johnson matter?

Because it connects several 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 Johnson & Johnson?

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 Johnson & Johnson.