computer science

IBM PS/2 Model CL57 SX

IBM PS/2 Model CL57 SX 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 IBM PS/2 Model CL57 SX rather than just read about it. In short: The IBM Personal System/2 Model CL57 SX (stylized as PS/2 Model CL57 SX) is the first notebook computer with a color TFT screen released by IBM in 1992. It was released a few months before the introduction of the ThinkPad series.

Key takeaways

IBM PS/2 Model CL57 SX 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 IBM PS/2 Model CL57 SX to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of IBM PS/2 Model CL57 SX from memory before moving on to harder problems.

Reference excerpt

The IBM Personal System/2 Model CL57 SX (stylized as PS/2 Model CL57 SX) is the first notebook computer with a color TFT screen released by IBM in 1992. It was released a few months before the introduction of the ThinkPad series.

Background It was developed by a joint venture between IBM and Toshiba. The sibling model in a PS/55 line was a PS/55 N27sx laptop.

Specifications It is based on the Micro Channel Architecture. It contains a 386SX at 20MHz, between 2 and 16 MB RAM, a 10.4" color TFT, weighed 11 lb (5.0 kg) and has a trackball. It can run IBM OS/2. It was priced at US$5,995 (equivalent to $13,750 in 2025) and available from April 1992.

Reception It was not favorably received by the market.

References

External links Laptop.pics Product info IBM Personal System/2 Model CL57 SX brochure at the Internet Archive.

Worked examples

Example 1 — a first encounter with IBM PS/2 Model CL57 SX

Start with the simplest possible case. Write down what IBM PS/2 Model CL57 SX 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 IBM PS/2 Model CL57 SX 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 IBM PS/2 Model CL57 SX 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 IBM PS/2 Model CL57 SX

In research: IBM PS/2 Model CL57 SX 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 IBM PS/2 Model CL57 SX 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: IBM PS/2 Model CL57 SX is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer-related introductions in 1992, Computer hardware stubs, IBM PS/2, so understanding it makes those chapters shorter.
In everyday life: Look for IBM PS/2 Model CL57 SX 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 IBM PS/2 Model CL57 SX in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what IBM PS/2 Model CL57 SX 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 IBM PS/2 Model CL57 SX out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is IBM PS/2 Model CL57 SX in simple terms?

Why does IBM PS/2 Model CL57 SX 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 IBM PS/2 Model CL57 SX?

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 IBM PS/2 Model CL57 SX.