those cards are Single Board Computers , SBC for short...
they are isa/pci/isa+pci combo cards, used in industrial applications or in machinery as complete systems. They can be coupled with special backplanes that have isa/pci slots and activate them, or co-exist with other sbc's ...
that is no amiga hardware, it is a complete standalone system that just takes power from the amiga like Piru said. there is no integration with the amiga, u need a seperate keyboard/mouse/monitor/hd/fdd etc...
plus u need to be carefull, as this higher end sbc's can take more power than what a standar amiga psu can deliver.
