Colour IBM PC Monitor and Gigahertz Chip, Co-Invented by Mark Dean c. 1980 and 1999

Before flat screens and hi-definition LCD monitors were the norm, PC displays were limited to screens with no color that were tethered to computers with limited processing power. That all changed thanks to Black inventor and engineer Mark Dean. Dean began working for IBM as a chief engineer in the early 1980s, making up a team of 12 people who would develop the first IBM PC. In addition to helping create IBM’s original machine in his early years with the company, he also worked to develop the color monitor and led the team that developed the first gigahertz processor. The massive chip, built in 1999, would allow for higher processing rates at faster speeds within PCs. (History Channel)