PC/104 has been around almost as long as I have, conceptualized within Ampro almost three decades ago back in 1987. In 1992, the now world-famous form factor was standardized and the PC/104 Consortium was born. This revolutionary thinking created the first multi-stackable computing platform.
The backplane and slot card method, long characteristic of desktop computing, has limitations in its compactness and the ruggedness (thus reliability) of peripheral interconnects via slots – both critical aspects of embedded systems.
Full report published here in Embedded Computing Design – May 2014