PICMG 's first working title of CompactPCI Serial was CPLUS. 0 .
This is why CompactPCI Serial and CompactPCI PlusIO as a whole were also called CompactPCI Plus .
PICMG 's first working title of CompactPCI Plus   was CPLUS. 0 .
This is why CompactPCI Serial and CompactPCI PlusIO as a whole were also called CompactPCI Plus .