The COM Express® standard was developed by PICMG for the computer-on-module (COM) form factor. The standard specifies, among other things, what size the module should be and where the mounting holes and pin connections for the carrier board should be positioned. COM Express® modules integrate the core functionalities of a bootable PC, including CPU, a graphics professor, internal memory, and standard interfaces.
Connecting a COM module to a carrier board reduces development time and costs. In addition, it is possible not only to extend the cycle of a product, but also to upgrade it by attaching newer, higher performance COM Express® modules to the carrier board.