B. U.S. Statistics

Figures 3 and 4 summarize the basic statistics on U.S. computers used in this report. Figure 3 shows the numbers of computers installed in the U.S. from 1967 to 1975. It shows the dramatic increase in the number of dedicated-application computers and consequently the dramatic increase in the total installed base.

Figure 4 shows the growth rate for six years of the numbers and the dollar value of U.S. installed computer systems. For this time frame an average of over 25,000 computer systems were added to the installed base per year, for an average yearly growth rate of almost 25%. During the same time frame, the dollar value of the installed computer systems increased on an average of almost $3 Billion per year, for an average yearly growth rate of over 10%. Since the numbers of computer systems reflect the large growth of dedicated-application computers which include most of the minicomputers, the growth rate of the numbers of computer systems should continue to be larger than the growth rate of the dollar value.