David Korn - Wikipedia, the free encyclopedia: "Korn shell and Microsoft
Due to Korn shell being one of the more popular shells written for the UNIX Operating System, Microsoft decided to include a version of it produced by Mortice Kern Systems in a UNIX integration package for Windows NT. This version was not compatible with ksh88 (a Korn shell specification), and Korn mentioned this during a question and answer period of a Microsoft presentation during a USENIX NT conference in Seattle in 1997. Greg Sullivan, a Microsoft product manager who was participating in the presentation, not knowing who the commenter was, insisted that Microsoft had indeed chosen a 'real' Korn shell. A polite debate ensued, with Sullivan continuing to insist that the man giving the criticisms was mistaken about the compatibility issues. Sullivan only backed down when an audience member stood up and mentioned that the man making the comments was David Korn."