To be fair on Gina/Jane, Tony, she went back to post 376 and inserted the barcode when I asked for it. As I said earlier, providing the link on the forum so we would all know it was available on line was generous of her.
For those who may not use or know the NAA system, the barcode is the unique identifier for each file. Going to the Advanced Search display provides a place to put the barcode in if it is known - much quicker and easier than typing in all the series number, etc.
I use them a lot now, keeping a list for each project that I can quickly refer to. The current project has some 300 files listed, mostly in series B2455, so you can see it can be quite a time saver in calling up files once the barcode is known.
Mike