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.
WorldWideWhiteboard
The WorldWideWhiteboard product was apparently the first successful web collaboration tool in wide use in education. Online whiteboards generally can accommodate a theoretically unlimited number of participants and an instructor in a synchronous, i.e., live interactive session. The WorldWideWhiteboard allows for both audio and up to four video streams, as well as numerous asynchronous modes of interaction.Certain of these studies have been cited widely, mainly because of the seminal role of the WorldWideWhiteboard as an educational Web-conferencing tool. (See, for instance, Reushle and Loch in "Conducting a Trial Web Conferencing Software." and the Abraham Baldwin Agricultural College Quality Enhancement Plan for 2007)