Adobe Content Server Message File
Adobe Digital Editions is a software and viewer program for eBooks and other digital publications. It can be used to transfer eBooks to other computers or devices, it can create libraries and organize your eBooks and supports the industry standard eBook formats PDF,PDA and EPUB.
Adobe Digital Editions makes use of files with the .acsm file extension these are Adobe Content Server Messages and are used when downloading eBooks from Adobe.
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How to open .acsm files?
Software to open .acsm files
What are .acsm files