Reported July 2007

BACKGROUND: Mark Dean is an African-American electrical engineer and computer scientist who holds more than 20 US patents, including three of IBM’s original nine personal computer patents. One of the technical and innovative driving forces behind the personal computer, Dean was recently inducted into the National Inventors Hall of Fame, one of only a handful of African-Americans who have been selected for that honor.

ACHIEVEMENTS: Today’s desktop computers exist in part because of Dean’s research. One of his earliest inventions was the Industry Standard Architecture “bus,” a user interface that permitted devices such as the keyboard, disk drives, and printers to be connected to the motherboard. He developed a method for displaying color on monitors, helped design several PS/2 subsystems, and tested the first gigahertz CMOS microprocessor. Dean was also instrumental in developing the unique cellular structure of IBM’s signature Blue Gene supercomputer.

ABOUT BLUE GENE: Blue Gene is a massively parallel computer designed to reach operating speeds in the petaflop range (see below for what a petaflop is). Right now, it can reach sustained speeds of more than 360 teraflops (just over a third of a petaflop). That translates into 360 calculations per second, making it the world’s fastest supercomputer. It is a cooperative project between IBM, Lawrence Livermore National Laboratory, the Department of Energy and academic researchers. In addition to exploring new ideas in massively parallel machine architecture and software, Blue Gene’s computational power enables scientists to run large-scale simulations of complex processes such as protein folding, or the reliability of the nation’s stockpile of nuclear weapons. Blue Gene consists of five separate networks connecting huge numbers of processors, rather than the conventional massive central switch used in other supercomputers.

WHAT'S A PETAFLOP?: A petaflop is a thousand trillion floating point operations per second. (A thousand trillion is a one with fourteen zeros after it.) FLOPS are floating-point operations per second. Floating-point is a method of encoding real numbers on computers. Using floating-point encoding, extremely long numbers can be handled relatively easily. The number of flops a computer can do shows how fast its computing speed is.

The Institute of Electrical and Electronics Engineers, Inc., contributed to the information contained in the TV portion of this report.

If you would like more information, please contact:

IBM Research, Almaden Research Center
San Jose, CA 95120
(408) 927-1283

For more information on computing and computer inventions:

Institute of Electrical and Electronics Engineers, Inc. IEEE-USA
Washington, DC 20036-5104
202-785-0017
http://www.ieee.org
ieeeusa@ieee.org

DID YOU KNOW?

Other famous African-Americans who have been inducted into the Inventors Hall of Fame include George Washington Carver and Percy Julian.

ON THE WEB...

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