World Wide Web Consortium (W3C) is an unincorporated conglomerate created by contracts between sponsoring organizations for the joint purpose of developing international standards for the Web.
Web 2.0 is the second generation of web development and design on the World Wide Web in which content is user-generated and dynamic. Web 2.0 has facilitated heightened user participation through the rise of web-based communities, hosted services, and applications, such as social-networking sites, video-sharing sites, wikis, and blogs.
A Web browser is a software application which enables users to display and interact with various types of data, which is typically located on the World Wide Web or a local area network. Although browsers are typically used to access the World Wide Web, they can also be used to access information provided by Web servers in private networks or content in file systems. Since each web browser interprets and formats HTML information for display, the appearance of a Web page may differ in various browsers.
A Wiki is any collaborative website where the content can be edited, deleted and modified by anyone who has access to it.
What You See Is What You Get (WYSIWYG) denotes a user interface where the on-screen text layout corresponds exactly with the appearance of the printed output.