MIL-STD-1553 is a military standard published by the United States Department of Defense that defines the mechanical, electrical, and functional characteristics of a serial data bus. It was originally designed as an avionic data bus for use with military avionics, but has also become commonly used in spacecraft on-board data handling (OBDH) subsystems, both military and civil. It features multiple (commonly dual) redundant balanced line physical layers, a (differential) network interface, time division multiplexing, half-duplex command/response protocol, and can handle up to 30 Remote Terminals (devices).

ProCustom group supports integration of 1553 with its customization of Getac laptops, including the B300, X500, and V110 laptops. Examples of CCA products used by ProCustom Group for PCIe 1553 integration includes Alta Data Technologies, Abaco Systems, and Data Device Corporation (DDC)