The Intel(R) 82371ABEB PCI Bus Master IDE Controller is a device driver used to manage communication between the operating system and the hardware that controls the IDE (Integrated Drive Electronics) storage devices such as hard drives and CD-ROM drives, connected through the PCI bus on a computer. It is often associated with older Intel chipsets, particularly those used in computers built during the late 1990s to early 2000s.

The "PCI Bus Master" part of the name refers to the ability of the controller to initiate data transfers directly to/from memory without the CPU's intervention (i.e., "bus mastering"), which can improve performance when transferring large amounts of data.