Anybody here know of a program to convert a scanned .pdf to plain text? I contacted Uof A yesterday and they sent me a copy of Loy E. Barton's paper "A Plate Modulation Transformer for Broadcasting Stations". Unfortunately the PDF is a scanned image. So I can't do anything with it. Adobe wants $14.95 / month to sign up for Adobe pro. I think I have heard of a technique called "backscatter" that will allow scanned image characters to be recognized by web pages and search engines.