CompactPCI is an adaptation of the PCI specification for industrial and/or embedded applications requiring a more robust mechanical form factor then desktop PCI. CompactPCI uses industry standard mechanical components and high performance connector technologies to provide an optimized system intended for rugged applications. CompactPCI provides a system that is electrically compatible with the PCI specification, allowing low cost PCI components to be utilized in a mechanical form factor suited for rugged environments.

CompactPCI is an open specification supported by the PICMG (PCI Industrial Computer Manufacturers Group), which is a consortium of companies involved in utilizing PCI for embedded applications.

CompactPCI exists to provide a standard form factor for those applications requiring the high performance of PCI as well as the small size and ruggedness of a rack mount system. CompactPCI provides the mechanism to directly apply PCI components and technology to a new mechanical form factor while maintaining capability with existing operating systems and application software available for desktop PCI.