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. Main features - **Collaborative editing:** Several contributors can edit pages, sometimes at the same time. - **Edit history:** Every modification is recorded with a timestamp and the editor’s identity or IP address. - **Interlinking:** Creating links among pages is straightforward, which helps interconnect content. - **Lightweight markup:** Simple markup languages (such as WikiText or Markdown) are used to format pages. - **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. Typical uses - Crowd-sourced knowledge resources (e.g., Wikipedia) - Project docs and corporate knowledge repositories - Collaborative writing and shared note-taking - Educational and classroom projects Pros - **Fast collaboration:** Contributors can rapidly create and improve content. - **Openness:** Transparency through revision histories and discussions. - **Expandable:** Wikis can grow naturally as contributors add new topics. Cons - **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:** Without clear governance, content may become fragmented or disputed. Example - **Wikipedia** — the largest example, maintained by the Wikimedia Foundation and contributed to by volunteers worldwide.