Defense and Aerospace Embedded Systems Rugged electronics based upon open systems for defense and aerospace applications. MIL-STD-1553B, ARINC 429, ARINC 664 - AFDX, TIME TRIGGERED PROTOCOL (TTP). VMEbus, VPX, OpenVPX, CompactPCI, PCI & PCI Express, PMC & XMC, ATCA & microTCA.