PCI-SIG, or Peripheral Component Interconnect Special Interest Group, is an electronics industry consortium responsible for specifying the Peripheral Component Interconnect (PCI), PCI-X, and PCI Express (PCIe) computer buses.

[1] The PCI-SIG is distinct from the similarly named and adjacently-focused PCI Industrial Computer Manufacturers Group.

As of 2024, the board of directors of the PCI-SIG has representatives from: AMD, ARM, Dell EMC, IBM, Intel, Synopsys, Keysight, NVIDIA, and Qualcomm.

[2] The PCI Special Interest Group was formed in 1992, initially as a "compliance program" to help computer manufacturers implement the Intel specification.

[4] PCI-SIG has a membership of over 800 companies that develop differentiated, interoperable products based on its specifications.