what is Stand Among x86-64 Virtual Machines

pob579

Hi,
I am reading some docs from potential solution supplier...
Cannot find any word on web about the term "Stand Among x86-64 Virtual Machines".

Here is the exact lines from the doc:

"Red Hat Linux support for Flex requires that the Client Enterprise Information Technologist be professionally certified to support and manage Flex Production Server requirements
for Stand Alone x86-64 Machine and Stand Among x86-64 Virtual Machines hosting Guest Red Hat Linux and Guest OS VM Partitions."

What for god sake is "Stand Among" means? And does the statement about professional certification for supporting and managing Flex production Server is true?

Thanks.