This Memorandum is a technical description of the RAND tablet, a graphical computer input device developed at the RAND Corporation. The RAND tablet is believed to be the first such graphic device that is digital, is relatively low-cost, possesses excellent linearity, and is able to uniquely describe 10 to the sixth power locations in the 10-inch by 10-inch active tablet area.
Davis, Malcolm and T. O. Ellis, The RAND Tablet: A Man-Machine Graphical Communications Device. Santa Monica, CA: RAND Corporation, 1964. https://www.rand.org/pubs/research_memoranda/RM4122.html.
Davis, Malcolm and T. O. Ellis, The RAND Tablet: A Man-Machine Graphical Communications Device, Santa Monica, Calif.: RAND Corporation, RM-4122-ARPA, 1964. As of July 28, 2021: https://www.rand.org/pubs/research_memoranda/RM4122.html