computer science

List of web directories

List of web directories 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 List of web directories rather than just read about it. In short: A web directory is a listing of websites organized in a hierarchy or interconnected list of categories. The following is a list of notable web directory services.

Key takeaways

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

Reference excerpt

A web directory is a listing of websites organized in a hierarchy or interconnected list of categories. The following is a list of notable web directory services.

General DOAJ.org – Directory of Open Access Journals Curlie.org (formerly DMOZ, also known as Open Directory Project – the largest directory of the Web. Its open content has been mirrored at many sites. The original DMOZ went offline in March 2017, but continued since August 2018 as Curlie. Jasmine Directory - Lists websites by topic and by region, specializing in business websites. Sources – Web portal for journalists, freelance writers, editors, authors, and researchers; in addition to a search engine it includes a subject-based directory.

Business directories Business.com – Integrated directory of knowledge resources and companies, that charges a fee for listing review and operates as a pay per click search engine. Yell – is a digital marketing and online directory business in the United Kingdom

Niche Library and Archival Exhibitions on the Web – international database of online exhibitions which is a service of the Smithsonian Institution Libraries. Virtual Library museums pages – directory of museum websites around the world.

Regional 2345.com – Chinese web directory founded in 2005. The website is the second most used web directory in China. Alleba – Filipino search engine website, with directory. Timway – web portal and directory primarily serving Hong Kong.

Defunct directories AboutUs.com – directory from 2005 to 2013. Anime Web Turnpike – was a web directory founded in August 1995 by Jay Fubler Harvey. It served as a large database of links to various anime and manga websites. Biographicon – directory of biographical entries. Dalilmasr – Egyptian online directory Google Directory – copy of DMOZ directory, with sites listed in PageRank order within each category. Closed in July 2011. Internet Public Library – librarian-edited directory, product of a merger with the Librarians' Internet Index (LII) in 2010. Closed in June 2015. Intute – directory of websites for study and research. Maintenance stopped in July 2011, archives remain available. LookSmart – operated several vertical directories from 1995 to 2006. Lycos' TOP 5% – from 1995 until 2000 it aimed to list the Web's top 5% of Websites. ProgrammableWeb – resource on APIs that provides a directory of APIs. World Wide Web Virtual Library (VLIB) – Was the first directory of the Web, and operated from 1991 to 2005. Yahoo Directory– first service that Yahoo! offered. Closed in December 2014. Yahoo Kids – oldest online search directory for children, until its discontinuation as of April 30, 2013. Zeal – volunteer-built Web directory; it was introduced in 1999, acquired by LookSmart in 2000, and shut down in 2006.

See also List of search engines Web directory

Worked examples

Example 1 — a first encounter with List of web directories

Start with the simplest possible case. Write down what List of web directories 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 List of web directories 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 List of web directories 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 List of web directories

In research: List of web directories 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 List of web directories 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: List of web directories is common in secondary-school and first-year university syllabi. It links to neighbouring topics Internet-related lists, Lists of websites, Social software, so understanding it makes those chapters shorter.
In everyday life: Look for List of web directories 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 List of web directories in 20 minutes

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

Frequently asked questions

What is List of web directories in simple terms?

A web directory is a listing of websites organized in a hierarchy or interconnected list of categories. The following is a list of notable web directory services.

Why does List of web directories 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 List of web directories?

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 List of web directories.