900KB/page seems high. The scanner I use produces LZW compressed TIFFs and wraps them in PDF - that ends up in the 200-250KB/page for US Letter size at 600dpi. Getting to 30-40KB/page with *lossless* compression would certainly be very impressive. However, it's taken pdf quite a while to become the defacto standard. I doubt that it will lose that mantle until something else comes along with (at the very least) an openly published spec. Anyway, I use PDF because that's what the scanner gives me. If someone wants to convert to some other format, that's absolutely fine by me. Thanks for the pointer - I'll try to give it a go sometime soon. Is the compression lossless (I took a quick look at their pages and could not tell). Is the format published i.e. could I write my own viewer. I don't think I would want to, but I'd be much happier if I knew I could if I absolutely had to (I didn't see any OpenVMS support on their pages ...) Antonio