MIT Press has kindly given me permission to put my first book, Practical Parallel Programming, up on the web. Many of the specifics are out of date, but I think (at least, I hope) much of the discussion is still useful. One problem, though: nobody has the electronic source for the book's hundred or more diagrams. I spent a couple of weeks sketching them with a pencil and straight edge in the VU library in the summer of 1994; a graphic artist in Boston then re-drew them using a Mac, but those files are long gone. I could chop a copy of the book and scan what I need as PNGs, but it got me wondering about OCR software for vector images. If anyone can recommend something, I'd welcome a pointer.