Complex sentence: Adobe Content Server is DRM software used to add digital rights management to eBooks and developed by Adobe Systems, designed to protect, and distribute Adobe eBooks in PDF or EPUB format through Adobe Digital Editions.
Split into simpler sentences: Adobe Content Server is DRM software used to add digital rights management to eBooks and developed by Adobe Systems. It is designed to "protect" and distribute Adobe eBooks in PDF or EPUB format through Adobe Digital Editions.