Foxit isn't a Format; it's a program for managing pdf filetypes. Adobe is the company that created pdf and sets the protocol for how pdf is formatted. Any pdf program can handle pdf filetypes. You would need to know if the other program(s) you are using will support not having an Adobe Reader installed, though. Example: QB "calls" Adobe Reader directly, to launch pdf from the QB program, so having Foxit is moot. I can use Foxit for my own needs, but I also need Adobe Reader installed for QB to use it. The same is true for IE; I can use Firefox and Chrome for my browser, but QB requires IE to be enabled, because QB will use IE protocol.