米国におけるPC、ミニコン、メインフレーム市場の歴史的推移1955-1984

下記の表の数値は、下記資料とは出典の違いのため、少し異なっている。

	Mainframes		Minis		Micros		Total
年	台数	金額	台数	金額	台数	金額	台数	金額
1955	150	63	0	0	0	0	150	63
1956	500	152	0	0	0	0	500	152
1957	660	235	0	0	0	0	660	235
1958	970	381	0	0	0	0	970	381
1959	1,150	475	0	0	0	0	1,150	475
1960	1,790	590	0	0	0	0	1,790	590
1961	2,700	880	0	0	0	0	2,700	880
1962	3,470	1,090	0	0	0	0	3,470	1,090
1963	4,200	1,300	0	0	0	0	4,200	1,300
1964	5,600	1,670	0	0	0	0	5,600	1,670
1965	5,350	1,770	250	29	0	0	5,610	1,799
1966	7,250	2,640	385	40	0	0	7,635	2,680
1967	11,200	3,900	720	69	0	0	11,920	3,968
1968	9,100	4,800	1,080	100	0	0	10,180	4,900
1969	6,000	4,150	1,770	152	0	0	7,770	4,302
1970	5,700	3,600	2,620	210	0	0	8,320	3,810
1971	7,600	3,900	2,800	218	0	0	10,400	4,118
1972	10,700	5,000	3,610	271	0	0	14,310	5,271
1973	14,000	5,400	5,270	369	0	0	19,270	5,769
1974	8,600	6,200	8,880	577	0	0	17,480	6,777
1975	6,700	5,410	11,670	642	5,100	77	23,470	6,128
1976	6,750	5,580	17,000	816	25,800	374	49,550	6,770
1977	8,900	6,600	24,550	1,203	58,500	761	91,950	8,563
1978	7,500	7,590	29,550	1,596	115,600	1,098	152,650	10,284
1979	7,200	7,330	35,130	2,038	160,000	1,488	202,330	10,856
1980	9,900	8,840	41,450	2,487	250,500	2,104	301,850	13,431
1981	10,700	9,540	44,100	2,699	385,100	2,503	439,900	14,842
1982	10,600	10,300	47,820	2,821	735,000	4,190	793,420	17,311
1983	9,985	10,480	45,420	3,330	1,260,000	5,300	1,315,405	19,110
1984	10,700	10,360	72,130	4,185	2,100,000	7,750	2,182,005	22,295

金額の単位：100万ドル

［引用元］Gordon, R.J.(199)”Computer Processors and Peripherals” in Gordon, R.J., The Measurement of Durable Goods Prices, University of Chicago Press, p.193
Table 6.1 U.S. Domestic Purchases of Electronic Computers, 1955-84 (value in millions　of dollars)
https://www.nber.org/system/files/chapters/c8314/c8314.pdf
［原出所］Source: 1960-84: Einstein and Franklin (1986, table I); 1955-59: Phister (1979, table 11.1.21)

Einstein, Marcus E., and James C. Franklin. 1986. “Computer manufacturing enters a new era of growth” Monthly Labor Review,109 (September):9-16.
Phister, Montgomery. 1979. Data processing technology and economics. 2d ed. Santa Monica, Calif.: DEC