computer science

Magic Link

Magic Link 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 Magic Link rather than just read about it. In short: The Magic Link was a Personal Intelligent Communicator marketed by Sony from 1994, based on General Magic's Magic Cap operating system. The Magic Link PIC-1000 was brought to market by Jerry Fiala Sr at Sony.

Key takeaways

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

Reference excerpt

The Magic Link was a Personal Intelligent Communicator marketed by Sony from 1994, based on General Magic's Magic Cap operating system. The Magic Link PIC-1000 was brought to market by Jerry Fiala Sr at Sony. The "Link" part of the name refers to the device's ability to send and receive data over a modem. A competing product to the Magic Link was the Motorola Envoy. In 1995, the Magic Link won the PC World World Class Award. Magic Link PIC-2000 was released in 1996.

Applications Messages Address Book Clock and Calendar Notebook Spreadsheet Datebook Phone Fax machine (Kobes Japan model only) Pocket Quicken Sony AV Remote Commander Calculator AT&T PersonaLink Services America Online mail client

Documentary film The device features prominently in the documentary film General Magic about the epic rise and fall of General Magic.

References

Illustrations

Worked examples

Example 1 — a first encounter with Magic Link

Start with the simplest possible case. Write down what Magic Link 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 Magic Link 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 Magic Link 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 Magic Link

In research: Magic Link 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 Magic Link 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: Magic Link is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer hardware stubs, Mobile computer stubs, Personal digital assistants, so understanding it makes those chapters shorter.
In everyday life: Look for Magic Link 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 Magic Link in 20 minutes

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

Frequently asked questions

What is Magic Link in simple terms?

Why does Magic Link 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 Magic Link?

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 Magic Link.