A little less than two years ago we started a project to write a suite of useful iPhone apps for pilots. The project was sponsored by a certain airplane manufacturer...So we figured that the first thing to do is to write a PDF reader that could handle huge PDF files, because pilots always have to read technical manuals, maps, various references, majority of which are available in PDF form...Then financial crisis changed the way how large and small companies spend their money, and the sponsorship from the airplane manufacturer was cut off. GoodReader was something like 50% ready at that time. We decided to finish it and to release as a general productivity app, just to see how things would go with it...