Whiteboard
Whiteboards became commercially available in the early 1960s, but did not become widely used until 30 years later. Early whiteboards needed to be wiped with a damp cloth and markers had a tendency to leave marks behind, even after erasing the board. Dry-erase markers for whiteboards were invented in 1975.
Hardboard
A product resembling hardboard was first made in England in 1898 by hot pressing waste paper. In the 1900s, fiber building board of relatively low density was manufactured in Canada. In the early 1920s, improved methods of compressing wet wood pulp at high temperatures resulted in a higher density product.