First before everybody gets confused, Adobe has not released a device to read e-book files, even though their software is sometimes referred to as "Adobe ebook Reader". Adobe Reader is a software viewer that "reads" pdf files. It is part of a suite of applications that creates, manages and edits Portable Document Files (pdf). Adobe Acrobat is probably the most recognized application of this document creation suite. Adobe Acrobat creates the documents and Adobe Reader enables users to read the documents created by Acrobat. The latest version of Adobe Reader is Adobe Reader version X. This software is available as freeware and can be downloaded directly from the Adobe website.
Adobe Digital Editions is an Adobe application that is more suited to read, manage and view e-book files. The difference between the two applications is that Adobe Reader is not limited to viewing only ebook files as it can open and view interactive forms, multimedia content and other content rich PDF files. Also, when viewing PDF files with Digital Editions, there are no tools for highlighting or leaving comments, functions that are available in Adobe Reader X.
You probably recognize the Adobe Reader application as the default software on your computer that opens pdf files such as manuals, brochures, or email attachments. Adobe Digital Editions is often used by libraries to manage and read the e-book files in their collection.
Is it incorrect to refer to Adobe Reader X as "Adobe Ebook Reader"? - no as it does read e-book files but if all you want to do is "read", it would be worth your while to download Adobe Digital Editions.
More than 600 million copies of Adobe Reader has been distributed worldwide
Adobe Reader is distributed worldwide on 23 platforms and 33 languages
Acrobat 1.0 was released in 1993 for Macintosh
Acrobat Reader was originally priced at $50 per user
The IRS purchased the rights to distribute Reader 1.0 and made it free for anyone who obtained it through them.