The
paper explains that not only can PCs do almost everything that the larger mainframes can do, but also they can do it at a significantly lower cost. The author points out that there are legitimate uses for the higher
mainframe power, especially when a company or institution needs to support hundreds or thousands of
users at the same time. The paper relates that, even if many PC computers are linked together with the server, they still cannot compare the I/O capability of the mainframe, which makes all the difference in certain applications.