Microsoft Encarta 2006 is the #1 best-selling encyclopedia brand. Microsoft Encarta Reference Library 2006 helps families and lifelong learners explore a world of knowledge that's accurate and engaging. Encarta Reference Library offers more engaging multimedia and more carefully reviewed, age-appropriate information than ever before - with over 68, 000 articles, over 25, 000 photos and illustrations, over 300 videos and animations, over 2, 500 sound and music clips and an interactive atlas with over 1.8 million map locations. Encarta Reference Library also gives you the all-new Web Companion, which automatically pulls up information from Encarta alongside your Internet search results. Whether you're searching online or offline, Children's Encarta is the trusted way for everyone in the family to easily find just about anything on just about any subject.<p>System Requirements Microsoft Windows 98 - 333 MHz - RAM 64 MB - HD 430 MB Microsoft Windows Millennium Edition - 333 MHz - RAM 64 MB - HD 430 MB Microsoft Windows 2000 Professional - 333 MHz - RAM 128 MB - HD 430 MB Microsoft Windows XP - 333 MHz - RAM 128 MB - HD 430 MB