Windows

• Intel Pentium 4 processor or later
• Windows 7 (32 or 64 bit running in 32-bit mode)
• 512MB of RAM (1GB recommended)
• 40MB of available hard-disk space

Mac OS

• Intel Core Duo or faster processor
• Mac OS X v10.8 or later
• 512MB of RAM (1GB recommended)
• 75MB of available hard-disk space

Linux

• Not supported

Latest specifications: http://www.adobe.com/solutions/ebook/digital-editions/tech-specs.html