A blog is a website where entries are commonly displayed in reverse chronological order and allow visitors to leave comments and engage in conversation. A wiki is a website that allows collaborative editing of its content and structure by its users and is often used to build encyclopedias and knowledge bases or to manage documents, often in a non-hierarchical manner. Both blogs and wikis allow for collaborative online work but blogs focus on periodic posts and commentary while wikis emphasize co-creation and editing of content.

1. A BLOG IS

2. A WIKI IS