Social media is any computer-mediated tool that allows people to create, share or exchange information, ideas, and pictures/videos in virtual communities and networks.
Kinds include: Group Texter, Location-Aware, Dating Service, Social Networker, Media Share, Social Gaming. Brief History: video.
In relation to technological innovation, systems theory has been used as a way of understanding the dynamics and cyclical nature of complex systems that give rise to, support and ultimately lead to the demise of new technologies.