The other category includes unpledged delegates representing Democrats living abroad and Democrats from American Samoa, Guam, Puerto Rico and the U.S. Virgin Islands. Delegates from U.S. territories are awarded fractionally. John Kerry's total in the other category also includes a partial pledged delegate from American Samoa.
Of the 4,322 total delegates to the Democratic National Convention, 802 are unpledged or "superdelegates." Unpledged delegates are typically members of the Democratic National Committee, elected officials like senators or governors, or party leaders, such as former presidents. The voting power of pledged and unpledged delegates is exactly the same. But unlike pledged delegates, if an unpledged delegate dies or for some reason is unable to participate at the convention, alternates do not replace that delegate. Therefore, the number of unpledged delegates could decrease, adjusting the total delegate number and reducing the "magic number" needed to clinch the nomination. For more about the delegate selection process, click here.