A wiki is a web platform that enables multiple users to collaboratively create, edit, and arrange content through a browser. Simplicity and openness are central to wikis: anyone can often add or change pages without technical knowledge, and edits are usually logged for review or rollback. Key features - **Collaborative editing:** Multiple people can edit the same pages, occasionally concurrently. - **Edit history:** Each change is logged with a time and the editor’s name or IP. - **Interlinking:** Creating links among pages is straightforward, which helps interconnect content. - **Lightweight markup:** Formatting is usually handled by lightweight markup languages (e.g., WikiText or Markdown). - **Permission settings:** Wikis may allow public editing or restrict changes to registered or authorized users. - **Discussion pages:** Separate talk pages allow contributors to discuss edits and structure. Frequent uses - Community knowledge bases such as Wikipedia - Project docs and corporate knowledge repositories - Cooperative writing and shared notes - Classroom and educational projects Advantages - **Fast collaboration:** Multiple people can add and refine content quickly. - **Openness:** Visibility into edits and discussions shows how decisions were reached. - **Expandable:** Wikis expand easily as contributors add and organize content. Cons - **Vandalism and false information:** Public editing can lead to vandalism or incorrect information. - **Inconsistent quality:** Entries may vary in accuracy, style, and completeness. - **Organizational issues:** Poor coordination or governance can cause content fragmentation and disputes. Notable example - **Wikipedia** — a well-known wiki operated by the Wikimedia Foundation and written by volunteers around the globe.