A book may be downloaded from Amazon to several devices at the same time.

In addition to the websites, information can be called up from or downloaded to mobile devices.

Now publishers are hoping that consumers will pay to download the text of books to computers or portable devices.

Under this model, books have not only turned into streams of electronic bits that are downloaded to hand-held devices or printed on demand.

In fact, some publishers are already offering bits and pieces of content for downloading to hand-held devices like Palm organizers.

As a result, users of Google will not be able to download such protected content to portable devices.

Google will allow unprotected content to be downloaded to portable devices, a person briefed on its plans said.

Ensure applications can be downloaded to devices and executed properly.

Users also will not be able to download music to portable devices or create their own CD's.

No option is available for downloading the books to portable devices.