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.
Ginny Lloyd
As a visiting artist in 1981, Lloyd worked at the Image Resource Center in Cleveland to create the first color Xerox billboard art assisted by the Cleveland Institute of Art printmaking faculty, Alexander Aitken. This was her third copy art billboard exploring the use of Xerox copiers in large formats. She continued to produce billboards nationally participating in The Art Billboard Project documented in her book "Billboard Art". She currently advises artists on the art of making billboards.