Twitter is a microblogging service that allows short 140-character status updates and uses a minimalistic interface like tabs and colorful themes. BBC used Twitter to provide updates during the Mumbai attacks. YouTube is a popular video sharing service that makes it easy to upload, watch, and share videos in high definition quality. Delicious is a social bookmarking website that allows users to easily save and share bookmarks online and access them from anywhere with clear listings and an uncluttered interface.