This two DVD Pack contains: - Memory-Map Navigator GPS Mapping Software - 1:25,000 scaletopographic maps - 1:50,000 scale topographic maps - 1:250,000 scale topographic maps - UBD Street Maps - 1:1million scale map and other base maps - Digital Terrain Model at a sharp 25m resolution - Index of places, and features System Requirements: Pentium class PC or equivalent, running Windows 2000, XP or Vista - 600 x 800 display - 250Mb free HDD. See below for full installation space requirements. - A CD-ROM or DVD-ROM drive (see chart below to see which is required) - 3D feature requires accelerated graphics card (standard on most XP configurations) - A minimum of 256MB RAM is recommended, particularly if running Windows XP. For Windows Vista we suggest a bare minimum of 512MB, although 1GB or more is recommended. Minimum Pocket PC Requirements (optional) - Microsoft "Pocket PC 2002" or "Windows Mobile for Pocket PC" operating system (2002 or later). - Storage card recommended Minimum Microsoft Windows Mobile Smartphone Requirements (optional) - Microsoft "Windows Mobile 2003" or "Windows Mobile 5 for Smartphones" operating system. - Storage card recommended NOTE: This DVD utilizes proprietary software, and does not interface with OziExplorer or Trackranger