“3M computer”的意思、由来-开放百科全书

3M was a goal first proposed in the early 1980s by Raj Reddy and his colleagues at Carnegie Mellon University (CMU) as a minimum specification for academic/technical workstations: at least a megabyte of memory, a megapixel display and a million instructions per second (MIPS) processing power.^[1] It was also often said that it should cost no more than a "megapenny" ($10,000).

At that time a typical desktop computer such as an early IBM Personal Computer might have 1/8 of a megabyte of memory (128K), 1/4 of a million pixels (640x400 monochrome display), and run at 0.33 million instructions per second (5Mhz 8088).

The concept was inspired by the Xerox Alto which had been designed in the 1970s at the Xerox Palo Alto Research Center. Several Altos were donated to CMU, Stanford, and MIT in 1979.

An early 3M computer was the PERQ Workstation made by Three Rivers Computer Corporation.^[2] The PERQ had a 1 million P-codes (Pascal instructions) per second processor, 256 KB of RAM (upgradeable to 1 MB), and a 768×1024 pixel display on a {{convert|15|in}} display. While not quite a true 3M machine, it was used as the initial 3M machine for the CMU Scientific Personal Integrated Computing Environment (SPICE) workstation project.

The Stanford University Network SUN workstation, designed by Andy Bechtolsheim in 1980, is another example. It was then commercialized by Sun Microsystems in 1982. Apollo Computer (in the Route 128 region) announced the Apollo/Domain computer in 1981.^[3] By 1986 CMU stated that it expected at least two companies to introduce 3M computers by the end of the year, with academic pricing of $3,000 and retail pricing of $5,000, and Stanford University planned to deploy them in computer labs.^[4] The first "megapenny" 3M workstation was the Sun-2/50 diskless desktop workstation with a list price of $8,900 in 1986.

The original NeXT Computer was introduced in 1988 as a 3M machine by Steve Jobs, who first heard this term at Brown University.^[5] Its so-called "MegaPixel" display had just over 930,000 pixels with four shades of gray. However, floating point performance, powered with the Motorola 68882 FPU was only about .25 megaflops.

Modern desktop computers exceed the 3M memory and speed requirements by many thousands of times, though the screen pixels are only 2 or 3 times larger (but full color so each pixel uses at least 24 times as many bits).

References

1. ^{{cite journal | author = Andries van Dam |author2=David H. Laidlaw|author3=Rosemary Michelle Simpson | title = Experiments in Immersive Virtual Reality for Scientific Visualization | date = 2002-08-04 |pages= 535–555 |volume= 26 |issue=4 | doi = 10.1016/S0097-8493(02)00113-9 |quote= In the early 1980s Raj Reddy and his colleagues at CMU coined the term '3M Machine'. | journal = Computers & Graphics |citeseerx=10.1.1.4.9249}}
2. ^{{cite web |title= PERQ History 1979: 3. Early Days |work= Atlas Computing Division Rutherford Laboratory |publisher= Chilton Computing |url= http://www.chilton-computing.org.uk/acd/sus/perq_history/part_1/c3.htm |accessdate= May 3, 2011 | archiveurl= https://web.archive.org/web/20110613122537/http://www.chilton-computing.org.uk/acd/sus/perq_history/part_1/c3.htm| archivedate= 13 June 2011 | deadurl= no}}
3. ^{{cite journal |title= The Limits of Autarky: Regional Networks and Industrial Adaptation in Silicon Valley and Route 128 |author= AnnaLee Saxenian |date= December 9, 1994 |journal= HUD Roundtable on Regionalism Sponsored by the Social Science Research Council |url= http://people.ischool.berkeley.edu/~anno/Papers/limits_autarky.html |accessdate= May 3, 2011 }}
4. ^{{cite news | url=https://books.google.com/books?id=lC8EAAAAMBAJ&lpg=PA14&pg=PA15 | title=Makers Ready '3M' Workstations | work=InfoWorld | date=1986-03-17 | accessdate=20 February 2015 | author=Forbes, Jim | pages=15}}
5. ^{{cite web |url = http://www.folklore.org/StoryView.py?project=Macintosh&story=Whats_A_Megaflop?.txt |title = What's A Megaflop? |accessdate = 2008-01-26 |author = Andy Hertzfeld |authorlink = Andy Hertzfeld |date = January 1983 |work = Macintosh Stories |publisher = folklore.org}}