At Baen, once you pay, you have access to all the filetypes, downloaded as many times as you want.
You can convert between them if you have the right software, but they have enough types that you supposedly won't have to. But if you wanted, for example, a PDF that was sized for the Sony Reader (~A6 size, but not exactly), you could start with the RTF and convert it. Or you could convert the RTF to eReader pdb, or make it a TealDoc, or whatever.
(Asking questions that have been asked before is fine; so far, I never get tired of talking about ebooks.)
no subject
You can convert between them if you have the right software, but they have enough types that you supposedly won't have to. But if you wanted, for example, a PDF that was sized for the Sony Reader (~A6 size, but not exactly), you could start with the RTF and convert it. Or you could convert the RTF to eReader pdb, or make it a TealDoc, or whatever.
(Asking questions that have been asked before is fine; so far, I never get tired of talking about ebooks.)