I thank the several individuals who have contributed to this thread as I have found it very interesting.
I have a large number of PDF files containing scans of sheetmusic on my Windows 7 PC. I had thought that I would put those files on my new iPad and then experiment with different PDF readers to see which one worked best for most of them. But from the research I have been doing that might not be possible. It seems that you do not transfer a file from a Windows PC to a location on the iPad but rather transfer the file to an application. Is that right? Does that mean that to try the same file in two different iPad PDF reader apps I would need to transfer the file twice (once to each app)? And if some day a better app comes along I would have to re-transfer all of the files?
Can the apps organize their files in some heirarchical manner? So I could have a folder of rap, a folder of show tunes, a folder of country, etc.?
A related question (although it has nothing to do with sheet music) - if I can have more than one PDF reader app on my iPad, which one does a browser use when I click on a link to a PDF file?
Thanks, Bob