Issue No. 02 - March/April (1972 vol. 5)
In the beginning there was ENIAC. Then there was the 650, then the 7090 and then the 360. By any reasonable mathematics that makes four generations, but by judicious use of zero- origin indexing, we can come out with the present day machinery belonging to the third generation. In this paper, we will try to look at the next three generations of computers.
C.C. Foster, "The Next Three Generations", Computer, vol. 5, no. , pp. 39-42, March/April 1972, doi:10.1109/C-M.1972.216891