|
|
| Year |
Bits per Dollar |
Type |
Vendor |
| 1949 |
0.02423 |
Vacuum Tube |
EDSAC - Vacuum Tube |
| 1951 |
0.03459 |
Vacuum Tube |
UNIVAC I - Vacuum Tube |
| 1955 |
0.090545 |
Vacuum Tube |
IBM 704 - Vacuum Tube |
| 1960 |
0.10386 |
Discrete Transistor |
DEC PDP-1 - Discrete Transistor |
| 1962 |
0.21193 |
Discrete Transistor |
DEC PDP-4 - Discrete Transistor |
| 1965 |
1.1623 |
Discrete Transistor |
UNIVAC 1108 - Discrete Transistor |
| 1968 |
6.5123 |
Integrated Circuit/Chip |
Data General Corp - Integrated Circuit/Chip |
| 1973 |
11.388 |
Integrated Circuit/Chip |
Scelbi |
| 1975 |
104.82 |
Integrated Circuit/Chip |
RGS SRAM |
| 1976 |
170.64 |
Integrated Circuit/Chip |
Godbove SRAM |
| 1977 |
286.33 |
Integrated Circuit/Chip |
James Electronic DRAM |
| 1978 |
381.32 |
Integrated Circuit/Chip |
Jade DRAM |
| 1979 |
499.38 |
Integrated Circuit/Chip |
Solid State DRAM |
| 1980 |
774.82 |
Integrated Circuit/Chip |
Advanced Computer DRAM |
| 1981 |
972.05 |
Integrated Circuit/Chip |
Advanced Computer DRAM |
| 1982 |
1810.5 |
Integrated Circuit/Chip |
Jameco DRAM |
| 1983 |
5364.6 |
Integrated Circuit/Chip |
California Digital DRAM |
| 1984 |
6537.3 |
Integrated Circuit/Chip |
Jameco DRAM |
| 1985 |
13646 |
Integrated Circuit/Chip |
JDR Microdevices DRAM |
| 1986 |
21053 |
Integrated Circuit/Chip |
JDR Microdevices DRAM |
| 1987 |
16628 |
Integrated Circuit/Chip |
Jameco DRAM |
| 1988 |
24710 |
Integrated Circuit/Chip |
JDR Microdevices DRAM |
| 1989 |
25907 |
Integrated Circuit/Chip |
ICS DRAM |
| 1990 |
76453 |
Integrated Circuit/Chip |
Unitex DRAM |
| 1991 |
100200 |
Integrated Circuit/Chip |
JDR Microdevices DRAM |
| 1992 |
164100 |
Integrated Circuit/Chip |
AMT SIMMS |
| 1993 |
182690 |
Integrated Circuit/Chip |
Advanced Computer SIMMS |
| 1994 |
177780 |
Integrated Circuit/Chip |
Nevada Computer SIMMS |
| 1995 |
221090 |
Integrated Circuit/Chip |
Nevada Computer SIMMS |
| 1996 |
260990 |
Integrated Circuit/Chip |
Sky 1 SIMMS |
| 1997 |
1753900 |
Integrated Circuit/Chip |
Intol SIMMS |
| 1998 |
3783300 |
Integrated Circuit/Chip |
Computer Upgrades SIMMS |
| 1999 |
6196700 |
Integrated Circuit/Chip |
Stargate Microsystems EDO DIMMS |
| 2000 |
7366900 |
Integrated Circuit/Chip |
StarSurplus SDRAM |
| 2001 |
52648000 |
Integrated Circuit/Chip |
SDRAM PC150 average |
| 2002 |
31469000 |
Integrated Circuit/Chip |
SDRAM PC150 average |
| 2003 |
36428000 |
Integrated Circuit/Chip |
SDRAM |
| 2004 |
93945000 |
Integrated Circuit/Chip |
SDRAM Generic |
RAM Bits per Dollar, Constant 2000 Dollars,
Logarithmic Plot, pg 75
Source:
47. Mark Brader, “A Chronology of Digital Computing
Machines (to 1952),” http://www.davros.org/misc/chronology.html;
Richard E.Matick, Computer Storage Systems and Technology
(New York: John Wiley and Sons, 1977);
University of Cambridge Computer Laboratory, EDSAC99, http://www.cl.cam.ac.uk/UoCCL/misc/EDSAC99/statistics.html;
Mary Bellis, “Inventors of the Modern Computer: The
History of the UNIVAC Computer—J. Presper Eckert and
John Mauchly,” http://inventors.about.com/library/weekly/aa062398.htm;
“Initial Date of Operation of Computing Systems in
the USA (1950–1958),” compiled from 1968 OECD
data, http://members.iinet.net.au/~dgreen/timeline.html;
Douglas Jones, “Frequently Asked Questions about the
DEC PDP-8 computer,” ftp://rtfm.mit.edu/pub/usenet/alt.sys.pdp8/PDP-8_Frequently_Asked_Questions_%28posted_every_other_month%29;
Programmed Data Processor-1 Handbook, Digital Equipment
Corporation (1960–1963), http://www.dbit.com/~greeng3/pdp1/pdp1.html#INTRODUCTION;
John Walker, “Typical UNIVAC® 1108 Prices: 1968,”
http://www.fourmilab.ch/documents/univac/config1108.html;
Jack Harper, “LISP 1.5 for the Univac 1100 Mainframe,”
http://www.frobenius.com/univac.htm;
Wikipedia, “Data General Nova,” http://www.answers.com/topic/data-generalnova;
Darren Brewer, “Chronology of Personal Computers 1972–1974,”
http://uk.geocities.com/magoos_universe/comp1972.htm;
www.pricewatch.com;
http://www.jc-news.com/parse.cgi?news/pricewatch/raw/pw-010702;
http://www.jc-news.com/parse.cgi?news/pricewatch/raw/pw-020624;
http://www.pricewatch.com (11/17/04);
http://sharkyextreme.com/guides/WMPG/article.php/10706_2227191_2;
Byte advertisements, September 1975–March 1998; PC
Computing advertisements, March 1977–April 2000.
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