EmbeddedXpress (EMX) is a new industry standard form factor for embedded computers that combines COM Express CPU modules with stackable I/O expansion. SBCs offer convenient off-the-shelf solutions but pose challenges for performance enhancement or product migration in an end of life situation. COMs offer performance scalability, wider choice of processors, and easier migration but (until now) require custom baseboard design. By utilizing COM modules in a stackable SBC format, EMX offers the best of both SBCs and COMs without the disadvantages of either.