Issue No.12 - December (1978 vol.11)
N. Rochester , IBM Corporation and MIT
A keyboard prototype offers one-handed operation, small size, low cost of manufacture, and permits the touch typing of large alphabets.
F.C. Bequaert, N. Rochester, "The Chord Keyboard", Computer, vol.11, no. 12, pp. 57-63, December 1978, doi:10.1109/C-M.1978.218024