computer science

Operating System Concepts

Operating System Concepts 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 Operating System Concepts rather than just read about it. In short: Operating System Concepts by Abraham Silberschatz and James Peterson is a classic textbook on operating systems. It is often called the "dinosaur book", as the first edition of the book had on the cover a number of dinosaurs labeled with various old operating systems.

Key takeaways

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

Reference excerpt

Operating System Concepts by Abraham Silberschatz and James Peterson is a classic textbook on operating systems. It is often called the "dinosaur book", as the first edition of the book had on the cover a number of dinosaurs labeled with various old operating systems. The bigger dinosaurs were labeled with the older big OSs. The ape-like creature was labeled UNIX. The idea was that like dinosaurs, operating systems evolve.

Publication history The first edition of Operating System Concepts was released in 1982 and was published by Addison-Wesley, as was every edition of the textbook since release. The book has been published in updated editions since 1983. The third edition added the author Peter Galvin, and the sixth edition added the author Greg Gagne. As of 18 June 2025 the textbook was in its tenth edition.

References

Worked examples

Example 1 — a first encounter with Operating System Concepts

Start with the simplest possible case. Write down what Operating System Concepts 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 Operating System Concepts 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 Operating System Concepts 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 Operating System Concepts

In research: Operating System Concepts 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 Operating System Concepts 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: Operating System Concepts is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1982 books, Addison-Wesley books, Computer book stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Operating System Concepts 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 Operating System Concepts in 20 minutes

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

Frequently asked questions

What is Operating System Concepts in simple terms?

Why does Operating System Concepts 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 Operating System Concepts?

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 Operating System Concepts.