BUSA is not a biologic species, therefore sex can not be conferred. The BUSA is a machine and so it follows, can not be either sex.
Long ago, men under sail would refer to their ships (the first big machines) as "female" in part because they missed their females many leagues away. Modern men have been handed down this term and continue to use it as we do like to be in control and usually find ourselves in control of our "mechanical female" in lieu of our bioloigcal female!
I think a lot of women are just the opposite. My wife, for instance, refers to her car as male in gender.
Quite possibly, those oriented toward the same sex might refer to their machines as the same gender as themselves.
By the way my BUSA is Suzi!!!!!!!!!
Just my .01 + .01 worth!