 The first model was announced at CeBIT 2008, and first listed for pre-orders on May 9, 2008.While initially 8.9- and 10.1-inch screen versions existed, as of 2010 only the 10.1" remained, with a resolution of 1024×600.While most models had 1 GB of RAM, some had 2 GB, and hard disks ranged from 80 GB on the oldest to 250 GB on the newest models.