Internet

Tagalog Wikipedia The Tagalog-language edition of Wikipedia, launched in 2003. A volunteer-built, free encyclopedia in Tagalog that covers general knowledge, Philippine topics, and language resource…

Tamil Wikipedia (தமிழ் விக்கிப்பீடியா) Tamil Wikipedia Tamil Wikipedia is the Tamil-language edition of Wikipedia, a volunteer-built online encyclopedia started in 2003 that serves Tamil speakers worldwide with encyclopedic content in…

Tatar Wikipedia — the Tatar-language edition of Wikipedia Tatar Wikipedia The Tatar-language edition of Wikipedia, a volunteer-built online encyclopedia supporting Tatar language content, cultural preservation, and free knowledge for Tatar speakers world…

Telnet (network protocol) Telnet Telnet is a text-based network protocol for remote terminal access. It was an early Internet standard but is now largely replaced by encrypted alternatives because it transmits dat…

Telugu Wikipedia Telugu Wikipedia is the Telugu-language edition of Wikipedia, launched in December 2003. It provides free encyclopedic content in Telugu, maintained by volunteers and supported by…

Teredo tunneling: IPv6 over IPv4 with NAT traversal Teredo tunneling Teredo is a tunneling protocol that provides IPv6 connectivity across IPv4 networks, including those using NAT. This article explains how it works, address format, components, uses…

Thai Wikipedia (วิกิพีเดียภาษาไทย) Thai Wikipedia The Thai-language edition of Wikipedia, launched in December 2003. A volunteer-created online encyclopedia in Thai script; it had over 133,000 articles as of October 2019 and serve…

The Pirate Bay: BitTorrent index and controversial file-sharing portal The Pirate Bay The Pirate Bay is a long-running Swedish BitTorrent index that allows users to find and download torrent files and magnet links; it is known for legal battles, intermittent shutdow…

TikTok — short-form video social network TikTok TikTok is a short-form, video-focused social platform known for vertical videos, algorithmic recommendations, creative editing tools, and a major role in music, trends, and creator…

Time Protocol (RFC 868) Time Protocol A simple Internet protocol for obtaining the current time as a 32‑bit count of seconds since 1900‑01‑01 GMT; historically used via TCP/UDP port 37 and largely superseded by NTP.

Time server (network time synchronization) Time server A time server provides accurate clock information across a computer network, using reference clocks and protocols such as NTP to keep systems synchronized for logging, security, an…

Toontown Online: Disney’s Cartoon-themed MMORPG Toontown Online Toontown Online was a family-friendly MMORPG created by The Walt Disney Company (released 2003, closed 2013) where players made cartoon characters called toons and battled corporat…

Top-level domain (TLD): overview, types, history and uses Top-level domain A top-level domain (TLD) is the last label in a domain name (the text after the final dot). This article explains its types, history, governance, registration, and practical uses.

Tor (The Onion Router): anonymity network and Tor Browser Tor (software) Tor is a distributed, volunteer-run network and software suite that helps preserve online anonymity by routing and encrypting traffic through multiple intermediary nodes; includes…

Transmission Control Protocol (TCP) Transmission Control Protocol TCP is a core transport-layer protocol of the Internet Protocol Suite that provides reliable, ordered, and error-checked delivery of a byte stream between applications across netwo…

Transport Layer Security (TLS) Transport Layer Security Transport Layer Security (TLS) is a suite of cryptographic protocols that secures data transferred over TCP/IP networks, providing confidentiality, integrity and authentication for…

Internet troll (online provocateur and disruptive behaviour) Troll (internet) An internet troll deliberately posts inflammatory, deceptive, or off-topic content to provoke reactions, disrupt online communities, or harass others. Responses include ignoring, m…

Tumblr — microblogging platform and social blogging network Tumblr Tumblr is a social microblogging platform founded in 2007 that combines short-form posts, multimedia sharing, customizable themes and community-driven reblogging and tagging.

Turkish Wikipedia (Türkçe Vikipedi) Turkish Wikipedia Turkish-language edition of Wikipedia, launched in December 2002. A volunteer-built encyclopedia in Turkish with hundreds of thousands of articles, governed by Wikimedia policies a…

Twitter (X): overview, features, history and cultural impact Twitter Twitter, often called a microblogging service, enables short public messages called tweets. This article explains its features, development, uses, controversies, and notable change…

Ukrainian Wikipedia The Ukrainian-language edition of Wikipedia, maintained by volunteers writing in Ukrainian; a major online encyclopedia and resource for Ukrainian language, culture, and current ev…

Ultima Online: pioneering persistent MMORPG and its sandbox world Ultima Online An overview of Ultima Online, the 1997 fantasy MMORPG that popularized persistent online worlds, player-driven economies, and shard servers; development, gameplay systems, and lega…

Uncyclopedia (satirical wiki) Uncyclopedia Uncyclopedia is a long-running satirical online encyclopedia that parodies reference sites. It publishes deliberately absurd, humorous articles under community guidelines rather th…

Undernet — an Internet Relay Chat network Undernet Undernet is a long‑running, volunteer‑operated Internet Relay Chat (IRC) network founded in 1992. It hosts thousands of channels, emphasizes open discussion and lightweight channel…

Uniform Resource Identifier (URI) Uniform Resource Identifier A URI uniquely identifies or names a resource on the Internet; it defines a standard syntax (scheme, authority, path, query, fragment) and the distinction from URLs and URNs.

Uniform Resource Locator (URL): structure, purpose, history and usage Uniform Resource Locator A Uniform Resource Locator (URL) identifies and locates resources on the Internet. This article explains URL structure, common uses, history, examples, and distinctions such as URL…

Urban75 — Brixton community website and messageboard Urban75 Urban75 (u75) is an independent Brixton-based website and forum founded in 1995 by Mike Slocombe, known for local news, culture, photography and active messageboards used by commun…

Urdu Wikipedia (اردو ویکیپیڈیا) Urdu Wikipedia Urdu Wikipedia is the Urdu-language edition of Wikipedia, begun in January 2004. It is a community-maintained, right-to-left encyclopedia in the Perso-Arabic script for Urdu speake…

URL shortening: purpose, mechanisms, history, uses and risks URL shortening Concise guide to URL shortening: what it is, how services work, historical context, common uses (social media, analytics), technical details and security or longevity concerns.

Usage share of web browsers Proportion of website visitors who use particular web browsers, how it is measured, major trends, causes of variation, and implications for developers and security.

Usenet: a distributed discussion network and its cultural legacy Usenet Usenet is a decentralized system for exchanging text messages and files across newsgroups. Originating in 1980, it shaped early Internet culture and introduced concepts like FAQs,…

User Datagram Protocol (UDP) User Datagram Protocol UDP is a simple, connectionless transport-layer protocol in the Internet Protocol Suite that sends datagrams with minimal overhead, used when low latency or simple message exchange…

VampireFreaks: Online Community for Gothic, Industrial and Alternative Scenes Vampirefreaks.com VampireFreaks.com is a long-running social network and cultural hub focused on gothic, industrial and alternative youth subcultures, offering forums, profiles, event listings and a…

Verizon FiOS — fiber-to-the-premises internet, TV and phone service Verizon Fios Verizon FiOS is a fiber-to-the-premises bundled service offering high-speed internet, telephone and television over a fiber-optic network in parts of the United States; availabilit…

Video sharing: platforms, technology, uses, and legal issues Video sharing Overview of video sharing: how people publish and distribute video online, the technical and social features of platforms, common uses, and legal or ethical considerations.

Vietnamese Wikipedia (Wikipedia tiếng Việt) Vietnamese Wikipedia The Vietnamese-language edition of Wikipedia, launched in November 2002. A volunteer-built online encyclopedia with over 1.27 million articles (Nov 2022), serving Vietnamese speake…

Vine (service): six‑second looping video platform and its legacy Vine (service) Vine was a short‑form video hosting service known for six‑second looping clips. Launched in 2013 and acquired by Twitter, it shaped early mobile video culture before being disconti…

Viral video A viral video is a short film or clip that spreads rapidly online through social sharing, often generating millions of views and cultural impact; it can be organic or engineered fo…

Virtual private network (VPN) Virtual private network A virtual private network (VPN) creates an encrypted tunnel across shared networks to link devices securely, providing confidentiality, authentication, and integrity for private co…

Volapük Wikipedia The Volapük edition of Wikipedia: an online encyclopedia in the constructed language Volapük, notable for automated article growth and debates about content quality and utility.

Voot: Indian ad-supported streaming service from Viacom18 Voot Voot is Viacom18's advertising-led video-on-demand platform in India, offering a multi-language library of TV shows, kids' content, originals and a premium tier alongside apps and…

VRML (Virtual Reality Modeling Language) VRML VRML is a text-based file format and scene-graph standard from the 1990s for describing interactive 3D graphics on the World Wide Web; it helped establish web 3D and was later succ…

Waray Wikipedia — Waray-language edition of Wikipedia Waray Wikipedia Waray Wikipedia is the Waray-language edition of Wikipedia, launched in 2005. By January 2021 it exceeded 1.2 million articles and ranked among the largest Wikipedia editions.

Wayback Machine A public web archive operated by the Internet Archive that preserves snapshots of web pages over time for research, reference, and digital preservation.

Web: spider webs, the World Wide Web, and related meanings Web “Web” denotes woven or networked structures: biological spider webs and webbing, the World Wide Web of linked information, and metaphorical uses describing complex interconnections…

Web 2.0: the interactive, social and user-generated web Web 2.0 Web 2.0 describes the shift from static web pages to interactive, user-centered platforms that emphasize contribution, social networking, collaboration and dynamic content.

Web accessibility: inclusive design for people with disabilities Web accessibility Web accessibility ensures websites and apps can be used by people with a wide range of disabilities. It covers design, coding, content and testing practices that improve access and…

Web browser — software for accessing and displaying the World Wide Web Web browser A web browser is software that retrieves, renders and navigates web pages. It interprets web standards, manages security and privacy, and provides user interface tools for browsing…