Popular e-Book Formats & Readers
Kindles also read .TXT and .Doc formats. Perhaps not super popular, but worth knowing.
And if you’re prepared to “tinker” with the Firmware? They’ll also read epubs. Granted not DRM protected epubs, but regular DRM free epubs? They work a charm.
[I’d also argue that the Kobo ecosystem being missing is strange, as I’m sure their marketshare is higher than that of Windows 7 / Phone.]
Some notes on the graphic I just posted (as a non-user of ereaders, I can’t speak to the accuracy of the graphic or the comments).