VMEbus is the most popular 16/32-bit backplane bus. Its use of the Eurocard format, its high
performance, and its versatility are some of the reasons that it appeals to a wide range of users.
The designer friendly and user friendly style of its specification offers useful advice and helps
ensure compatibility between VMEbus products
VITA = VME industry trade association. They have many,
many sub-specifications, the VME system has propagated
many specialized variants. VITA xy specs for each of them.
You can join the association for free if you don't feel a
need to vote or argue, and download whatever. You
probably want to pick your format / system spec before
you go any distance into design.