computer science

National Videotex Network

National Videotex Network 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 National Videotex Network rather than just read about it. In short: National Videotex Network (NVN) was an online service launched in 1992 by U.S. Videotel.

Key takeaways

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

Reference excerpt

National Videotex Network (NVN) was an online service launched in 1992 by U.S. Videotel. The service was meant to compete with similar text-based online services such as CompuServe, Delphi and GEnie. Following its competitors' business model, NVN offered basic and premium services that included national and global news and weather, research libraries and databases, online forums, and games including Island of Kesmai and MUD II. NVN was hoping to attract customers by offering Internet access and relatively low rates for access through packet switching networks. The service was abruptly terminated on June 17, 1994. At the time of its termination, NVN programmers were working on a graphical front end for the service.

References

Worked examples

Example 1 — a first encounter with National Videotex Network

Start with the simplest possible case. Write down what National Videotex Network 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 National Videotex Network 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 National Videotex Network 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 National Videotex Network

In research: National Videotex Network 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 National Videotex Network 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: National Videotex Network is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer network stubs, Pre–World Wide Web online services, so understanding it makes those chapters shorter.
In everyday life: Look for National Videotex Network 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study National Videotex Network in 20 minutes

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

Frequently asked questions

What is National Videotex Network in simple terms?

National Videotex Network (NVN) was an online service launched in 1992 by U.S. Videotel.

Why does National Videotex Network 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 National Videotex Network?

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 National Videotex Network.