Social media 2004, Yahoo! 360° in March 2005, Bebo in July 2005, Twitter in July 2006, Tumblr in February 2007, and Google+ in July 2011. As operating systems with a graphical user interface, such as Windows 95 and Mac OS begin to emerge and gain popularity, this created an environment that allows for early social media platforms to thrive and exist. The variety of evolving stand-alone and built-in social media services makes it challenging to define them. However, marketing and social media experts broadly agree that social media includes the following 13 types of social media: blogs, business networks, collaborative projects, enterprise
Troy (Dorsey, Maryland) which was split into two unequal parts in 1760 and given to Sarah Dorsey and Thomas Dorsey. Thomas Dorsey would use the root cellar as a meeting place with Benjamin Warfield of Cherry Grove during the revolutionary war. Thomas's widow Elizabeth split Troy several times to pay debts. Vincent Bailey acquired including Troy for $6,520. A stone house named "Troy Hill" was built about 1808 on the foundation of an earlier Dorsey house by Vincent Baily and is representative of the late Georgian style in Maryland architecture. The -story fieldstone house is three bays wide and two deep. Outbuildings included