อ้างอิง ของ กราฟิกส์แท็บเล็ต

  1. ↑ Gray, Elisha (1888-07-31), Telautograph, United States Patent 386,815
  2. ↑ Dimond, Tom (1957-12-01), Devices for reading handwritten characters, Proceedings of Eastern Joint Computer Conference, pp. 232–237, สืบค้นเมื่อ 2008-08-23
  3. ↑ Mackintosh, Hamish (18 March 2004). "Talk time: Todd Rundgren". The Guardian.
  4. ↑ Pencept Penpad (TM) Manual, Pencept, Inc., 1983-06-15
  5. ↑ GP-10 SAC Two-dimensional Sonic Digitizer, Science Accessories Corporation, 1988-06-15

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