B2B..........is used to refer to people who sell things or provide services to people who sell/make things.... so you are a the first B your customer is the second B.....hence the clever handle B2B......
it had this retired Air Force guy going crazy for some time trying to figure what some un-aircrafty lookin' people were doing with the other B2B...........the bomber.....
hope this helped...
TTFN
HT
Don