format of each e-book, plus the partial e-ARC versions. Webscriptions therefore used stock-keeping units (SKUs) and ISBNs, instead. (The DOIs found in some older Baen e-books do not work.) Supported e-book formats Baen Ebooks supports seven e-book formats. Purchasers can download an ebook in as many formats as they want, even years after the actual purchase. This list includes a partial list of devices or software which can be used with each format: References External links Baen Ebooks home page Webwrights (operating company) home page Book selling websites Internet properties established in 1999 Organizations established in 1999 Book publishing companies of the United States Science fiction publishers Ebook suppliers 1999 establishments in the United States Baen Books