Born in Jefferson City, Tennessee, Dean holds a bachelor’s degree in electrical engineering from the University of Tennessee, a master’s degree in electrical engineering from Florida Atlantic University and a Ph.D. in electrical engineering from Stanford University. Dean is the first[5] African-American to become an IBM Fellow which is the highest level of technical excellence at the company. In 1997, he was inducted into the National Inventors Hall of Fame.
Mark E. Dean (born 2 March 1957) is an inventor and a computer scientist. He led the team that developed the ISA bus, and he led the design team responsible for creating the first[citation needed] one-gigahertz computer processor chip. He holds three of IBM’s original nine PC patents.
Dr. Mark Dean started working at IBM in 1980 and was instrumental in the invention of the Personal Computer (PC). He holds three of IBM’s original nine PC patents and currently holds more than 20 total patents. The famous African-American inventor never thought the work he was doing would end up being so useful to the world, but he has helped IBM make instrumental changes in areas ranging from the research and application of systems technology circuits to operating environments. One of his most recent computer inventions occurred while leading the team that produced the 1-Gigahertz chip, which contains one million transistors and has nearly limitless potential.
He was one of a dozen IBM engineers who designed the first machine and was fortunate to have lead subsequent IBM PC designs through the 1980s.
http://asmarterplanet.com/blog/2011/08/ibm-leads-the-way-in-the-post-pc-era.html
http://www.black-inventor.com/Dr-Mark-Dean.asp
Mark Dean, one of the dozen engineers who designed the original PC and holder of about one-third of all patents for the IBM PC.
http://www.forbes.com/sites/sap/2011/08/11/personal-computers-becoming-obsolete-says-ibm-pc-architect/