Don't you love Wikipedia.   As it has been said by others follow the money (or in this case the law suites)....

On Sun, Jun 24, 2018 at 3:50 AM, Mutiny <> wrote:
>From: Johnny Billquist <>
>To me it sounds as if you are saying that DEC did/designed PCI.
>Are you sure about that? As far as I know, PCI was designed and created
>by Intel, and the first users were just plain PC machines.

Work on PCI began at Intel's Architecture Development Lab c. 1990.