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.
RAND Tablet
Development of the RAND Tablet began with research on the Sketchpad, a system where the user could write commands for a computer directly on the tablet, conducted by Ivan Sutherland. A multitude of different experimental systems were developed to recognize handwritten letters and gestures like Tom Ellis' flowchart based Graphic Input Language (GRAIL) method. Tom Ellis, an author of many RAND corporation reports, stated that this GRAIL system was what allowed the natural and real-time recognition of text and symbols written on the flowchart. The RAND Tablet was one of the first devices to recognize freehand drawing, using programs like Ellis'. The RAND Tablet was also called the "Grafacon" and is considered one of the first produced graphics tablets. The original RAND Tablet cost $18,000 and was available to research facilities in 1964 after years of development. However, the RAND Tablet did not catch on commercially, likely due to an inertia in user habits which made consumers more familiar with a keyboard device, and the lack of practical applications for a tablet device during this time period.