Sony PRS-650RC - Manual (Page 20)

Step 3: Authorize your Computer and Reader
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Create an Adobe account.
Once you have the Adobe website displayed on-
screen, you will see a link [Create an Adobe
Account].
Click on this to begin the set-up process. You
will receive step-by-step instructions as you
proceed through the registration process.
Make a note of your Adobe ID and password -
you will need this information later.