Definition - What does Mobipocket Reader mean?
Mobipocket reader allows users to organize, read and annotate their e-books with the use of its desktop or mobile reader application. Mobipocket reader works with almost all electronic document formats and provides a single interface for viewing and managing these documents.
Techopedia explains Mobipocket Reader
Mobipocket reader also supports the synchronization of user annotations, the formation of groups and the orchestration among different devices installed with the reader application. Mobipocket also provides means to send an e-book to another person's device.