I suppose we could call Kahn the primary author of Turbo Pascal v1 if we exclude the actual compiler from the definition of "Turbo Pascal", but I'm not sure why we'd do that, especially in the context of this article. He definitely deserves credit for establishing the product category of "credible off-the-shelf IDE for commodity microcomputers", though.

I didn't realize Anders Hejlsberg wrote the compiler in the original Turbo Pascal! Thank you for the correction.