Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

	1	Bush, V. 1945a. Science---The Endless Frontier, Appendix 3, Report of the Committee on Science and the Public Welfare. U.S. Government Printing Office, Washington, D.C. (Reprinted as National Science Foundation Report 1990, online http://rits.stanford.edu/siliconhistory/Bush/Bush_text.html.)
	2	Bush, V. 1945b. As we may think. The Atlantic Monthly (July). http://www.theatlantic.com/unbound/flashbks/computer/bushf.htm.
	3	"From Micro-device to Smart Dust", Science News, 6/26/97, Vol. 152(4), pp. 62--63.
	4	Graph based on data in Hans P. Moravec Robot, Mere Machines to Transcendent Mind, Oxford, 1999, ISBN 0-19-511630-5, http://www.frc.ri.cmu.edu/∼hpm/book98/) personal communication with Larry Roberts who developed the metric in 1969, and personal communication with Gordon Bell who helped analyze the data and corrected some errors.
	5	Lesk, M. 1997. "How much information is there in the world?" http://www.lesk.com/mlesk/ksg97/ksg.html.
	6	Newell, A. 1990. Fairy tales. In Kruzweil, R. The Age of Intelligent Machines. MIT Press, Cambridge, Mass., ISBN: 0262610795, pp. 420--423.
	7	Raj Reddy, To dream the possible dream, Communications of the ACM, v.39 n.5, p.105-112, May 1996  [doi>10.1145/229459.233436]
	8	Thomas L. Sterling , John Salmon , Donald J. Becker , Daniel F. Savarese, How to build a Beowulf: a guide to the implementation and application of PC clusters, MIT Press, Cambridge, MA, 1999
	9	Turing, A. M. 1950. Computing machinery and intelligence. Mind, LIX. 433--460. (Also on the web at many sites. K. Appel and W. Haken, "The solution of the four-color-map problem," Scientific American, Oct 1977, 108--121, http://www.math.gatech.edu/∼thomas/FC/fourcolor.html (1995) has a "manual" proof.)
	10	Vinge, V. 1993. Technological singularity. VISION-21 Symposium sponsored by NASA Lewis Research Center and the Ohio Aerospace Institute, (Mar.). (Also at http://www.frc.ri.cmu.edu/∼hpm/book98/com.ch1/vinge.singularity.html.)
	11	Wells-Branscomb, A. 1995. Who Owns Information?: From Privacy to Public Access. Basic Books, ISBN: 046509144X.
	12	Zachary, C.P. 1997. Endless Frontier: Vannevar Bush, Engineer of the American Century. Free Press, ISBN: 0-684-82821-9.

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