Borrowing ideas from the original Unix shell written by Ken Thompson, the Bourne shell written by Steve Bourne at Bell Labs and the C shell written by Bill Joy at Berkeley, Korn added his own ideas and turned them into a more general scripting language. Looking for a better and easier-to-use Unix command language, Korn in the early 1980s wrote what was to become the ubiquitous Korn shell. Korn, an application software developer with a background in aerodynamics, was assigned to two of the "first real Unix projects at Bell Labs," he says - one to establish a centralized, mainframe-based database for internal systems, and the other to create a way to update electronic communication switches. Now an AT&T Fellow, Korn came to Bell Labs in 1976, just when Unix was beginning to move into the outside world in a serious way. Here's a brief look at three people, among thousands, who have made a difference in the Unix world. That's entirely fair, but as with most important technologies, it's the people who follow the pioneers who often make the difference between a fabulous lab prototype and a technology that really transforms the landscape. Programmers Ken Thompson and Dennis Ritchie are most often credited with the invention of Unix at Bell Labs in 1969 and the early 1970s.
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