Wikis are websites built for collaborative authoring, allowing numerous contributors to add, edit, and structure content online. Wikis prioritize ease of use and openness: pages can be added or changed without technical expertise, and most track every edit so changes can be reviewed or undone. Main features - **Collaborative editing:** Several contributors can edit pages, sometimes at the same time. - **Edit history:** All edits are stored with timestamps and the author’s name or IP. - **Interlinking:** It’s easy to create links between pages, forming an interconnected knowledge base. - **Lightweight markup:** Pages are typically formatted with lightweight markup like WikiText or Markdown. - **Permission settings:** Some wikis are open to anyone; others limit edits to registered users or specific groups. - **Discussion pages:** Dedicated discussion pages enable contributors to coordinate and discuss content. Common uses - Crowd-sourced knowledge resources (e.g., Wikipedia) - Internal documentation and company knowledge bases - Cooperative writing and shared notes - Classroom and educational projects Benefits - **Fast collaboration:** Contributors can rapidly create and improve content. - **Openness:** Visibility into edits and discussions shows how decisions were reached. - **Expandable:** Wikis expand easily as contributors add and organize content. Limitations - **Vandalism and false information:** Open contribution can result in deliberate or accidental misinformation. - **Inconsistent quality:** Articles can differ greatly in depth, tone, and reliability. - **Organizational issues:** Poor coordination or governance can cause content fragmentation and disputes. Notable example - **Wikipedia** — the largest example, maintained by the Wikimedia Foundation and contributed to by volunteers worldwide.