computer science

Patinho Feio

Patinho Feio 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 Patinho Feio rather than just read about it. In short: Patinho Feio (Portuguese for "Ugly Duckling", in reference to the fairy tale) was the first minicomputer designed and manufactured entirely in Brazil. It was made between 1971 and 1972 in the Polytechnic School of the University of São Paulo by the Digital Systems Laboratory (currently called Department of Computer Engineering and Digital Systems).

Key takeaways

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

Reference excerpt

Patinho Feio (Portuguese for "Ugly Duckling", in reference to the fairy tale) was the first minicomputer designed and manufactured entirely in Brazil. It was made between 1971 and 1972 in the Polytechnic School of the University of São Paulo by the Digital Systems Laboratory (currently called Department of Computer Engineering and Digital Systems).

Technology Patinho Feio was an 8-bit minicomputer with a memory of 8 kB and an instruction cycle of 2 microseconds. It was programmed in assembly language.

Worked examples

Example 1 — a first encounter with Patinho Feio

Start with the simplest possible case. Write down what Patinho Feio 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 Patinho Feio 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 Patinho Feio 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 Patinho Feio

In research: Patinho Feio 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 Patinho Feio 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: Patinho Feio is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer-related introductions in 1971, Computer hardware stubs, Computers designed in Brazil, so understanding it makes those chapters shorter.
In everyday life: Look for Patinho Feio 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 Patinho Feio in 20 minutes

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

Frequently asked questions

What is Patinho Feio in simple terms?

Why does Patinho Feio 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 Patinho Feio?

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 Patinho Feio.