Multimedia is a combination of various media types like text, graphics, sound, animation and video. It can be delivered electronically or digitally. Multimedia projects require creative, technical, organizational and business skills. Multimedia is interactive when users can control elements and is called hypermedia when it provides a linked navigational structure. Multimedia is used widely in business, education, public spaces and homes for purposes like presentations, training, marketing, education and information. Virtual reality extends multimedia by using its elements like imagery and sound to create realistic 3D computer environments.