A bitmap index has a significantly different structure from a B-tree index in the leaf node of the index. It stores one string of bits for each possible value (the cardinality) of the column being indexed.
With MightyMeeting you can manage a library of PowerPoint presentations directly from your smartphone or tablet. You can share them via email, blog, Twitter, or Facebook. You can start or join web meetings directly from your laptop, iPhone, iPad, or an Android phone.
TweetGrid is a powerful Twitter Search Dashboard that allows you to search for up to 9 different topics, events, converstations, hashtags, phrases, people, groups, etc in real-time. As new tweets are created, they are automatically updated in the grid. No need to refresh the page!