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==== FASTBUS ====
[[fastbus|FASTBUS]]<ref name="FNAL intro to Fastbus">{{cite web|title=AN INTRODUCTION TO FASTBUS|url=http://www-esd.fnal.gov/esd/catalog/intro/introfb.htm|publisher=FNAL}}</ref> was a crate/module standard developed later than the other two for high-speed parallel data acquisition. Rather than individual components, FASTBUS modules tended to be data acquisition modules with lots of input connectors on the front, and then the stored data would be read out on the backplane. The connectors on the back of a FASTBUS module were 2 parallel pin sockets on the module and pins sticking out of the backplane. The main connector in a fastbus crate covered about the bottom 2/3 of the module. There was also an upper connector that was merely pass-through pins to the back side of the backplane; this allowed custom modules to be plugged in there.
Fastbus modules are much taller than the other types of crate modules, so the crates are correspondingly taller.
The FASTBUS backplane was a full data bus where any module could negotiate to be master of the bus to send or receive data.
==== VME ====
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