Issue No. 07 - July (1979 vol. 12)
The Open Channel is exactly what the name implies: a forum for the free exchange of technical ideas. Try to hold your contributions to one page maximum in the final magazine format (about 1000 words).
"The Open Channel", Computer, vol. 12, no. , pp. 86-87, July 1979, doi:10.1109/MC.1979.1658822