Main features: - PC with 300 megahertz or higher processor clock speed - Internet Explorer 5.5 browser software or later, Internet Explorer 7.0 included (will not displace your primary browser) - For Windows Vista: 1 GB of RAM - For Windows XP: 128 MB of RAM (256 MB recommended) - For Windows Server 2003: 256 MB of RAM - Running additional applications simultaneously may require additional memory - Available hard-disk space: 1.9 GB. As the #1 best-selling travel and map software, it gets you where youre going quickly, easily, and without all the guesswork. Create custom routes, set driving preferences, plan breaks, and calculate travel costsEvery trip is a good one with Microsoft Streets & Trips 2009! Streets and Trips will help you create custom routes, set driving preferences, plan breaks, and calculate travel costs, this trip planning software makes travel easier, whether youre going around town or anywhere across the U.S.