I don't know what context they are using it, but here's my guess.
I believe they are referring to the boards on the lane. For example, for a right hander the second arrow from the gutter is often called 10 board, third arrow is 15 board, fourth arrow is 20, and so on.
On edit: Good answer Anglo. If I had just waited a minute I wouldn't have needed to type at all.
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Lane Carter, Strike Zone Pro Shops - Salt Lake City, Utah
Brunswick Amateur Staff
Edited on 5/20/2008 10:45 AM