What's a 710?

I used to train newbies at a local parts store, so to find out some of there knowledge I would ask certain questions and see what kind of response I would get:
1)find me a water pump for a 71 vw beetle?
2)find me pistons for a 87 mazda rx-7
etc etc
believe me I had one guy calling parts suppliers for that water pump,everyone would laugh & he couldn't understand what air cooled meant.