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Hi.
Essentially, the ePub standard does not specify a standard DRM. As a result, there are actually several different competing DRM schemes.
1. Adobe Digital Editions Adept DRM. This DRM scheme is essentially supported by most eBook readers with the exception of the Kindle. Unfortunately, it does require registering your device.
2. Adobe Digital Editions with eReader DRM. This DRM was developed originally for the eReader ebook format (supported mostly by Fictionwise, which is now owned by B&N), and was ported into Adobe Digital Editions by B&N and Adobe. It is only supported by a handful of devices (Though any device with ADE could support it) including the Nook, the Pandigital Novel ereaders and I am pretty sure the Jetbook and Jetbook-Lite. Only B&N sell books with ereader DRM on them.
3. Apple DRM... I am pretty sure you have to register your iPad/iPod, but it is probably pretty seemless.
So, essentially, unless you are planning on buying all your books from B&N, you are probably going to have to register your device.
--
Bill
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