A whiteboard (also known by the terms marker board, dry-erase board, wipe board, dry-wipe board, pen-board, and grease board) is any glossy, usually white surface for nonpermanent markings. Whiteboards are analogous to blackboards, but with a smoother surface allowing rapid marking and erasing of markings on their surface. The popularity of whiteboards increased rapidly in the mid-1990s and they have become a fixture in many offices, meeting rooms, school classrooms, and other work environments.
A Green Board (also known as a chalkboard) is a reusable writing surface on which text or drawings are made with sticks of calcium sulfate or calcium carbonate, known, when used for this purpose, as chalk.
Combination Board is combination of both Green and White Board.