Social media is the collective of online communications channels dedicated to community-based input, interaction, content-sharing and collaboration. Websites and applications dedicated to forums, microblogging, social networking, social bookmarking, social curation, and wikis are among the different types of social media.
Trello is a free web-based project management application originally made by Fog Creek Software in 2011, that spun out to be its own company in 2014. It operates a freemium business model, as well as being cross-subsidized by other Fog Creek Software products.
Trill (music) The trill (or shake, as it was known from the 16th until the 19th century) is a musical ornament consisting of a rapid alternation between two adjacent notes, usually a semitone or tone apart, which can be identified with the context of the trill. (compare mordent and tremolo).