the titles were sold on Kobo; the transfer period ended in May. Apple Mac OS X Sony released an official Apple Mac OS X client for the Reader with the release of the PRS-300 and PRS-600. It is reported to work with the PRS-505, PRS-700, Reader Pocket Edition and Reader Touch Edition. The software now works under 10.7 Lion. Linux and other OS Sony eBook Library was not officially supported on Linux-based systems or other operating systems, although when the device is connected it grants access to its internal flash memory and any memory card slots as though they were USB Mass Storage devices (on all models except PRS-500s that have not received the free EPUB upgrade from Sony), allowing the user to transfer files directly. See the Third party tools section below for a third-party software utility that provides comprehensive support for MS Windows, Apple Mac OS X, and Linux. Note if the device is locked, using the optional 4 digit pin it will not mount via USB, the lock option needs to be disabled in order to mount the device. Third party tools Several third-party tools exist for the Sony Reader. For example, the PRS Browser for Apple Mac OS X from Docudesk allows Apple Macintosh users to manage content on the Sony Reader. Users can also use the free software library and utility called Calibre to communicate with the Reader and manage their digital library. Calibre can convert many ebook formats as well as collate multiple HTML pages into a single ebook file with an automatically generated table of contents. Calibre can also manage RSS subscriptions, including scheduled pushes of newsfeeds to the reader. It has both a command line and graphical interface, and is available for MS Windows, Apple Mac OS X and Linux. Calibre notably does not offer MS Windows 64-bit support for the PRS-500 model either. Specialized on notes, annotations, bookmarks and other input by the user, noteworks allows for listing, exporting and other handling of this data, extracted from the device. In addition, Adobe Digital Editions can deliver DRM-locked PDF and ePub documents to the PRS-350, PRS-505 and PRS-700. The software is officially available for Windows and Mac OS. It can be run on Linux using Wine. After activating the reader on an officially supported platform, DRM-locked media can be downloaded and transferred to the reader on Linux as well. Alternative firmware PRS+