From DMJ Productions

Multimedia is a form of communication that uses a combination of different content forms, such as writing, audio, images, animations, or video, into a single interactive presentation, in contrast to traditional mass media, such as printed material or audio recordings, which feature little to no interaction between users. Popular examples of multimedia include video podcasts, audio slideshows, and animated videos. Multimedia also contains the principles and application of effective interactive communication, such as the building blocks of software, hardware, and other technologies.

The five main building blocks of multimedia are text, image, audio, video, and animation. The first building block of multimedia is the image, which dates back 15,000 to 10,000 B.C. with concrete evidence found in the Lascaux caves in France.

From Wikipedia