Digital media includes five main types: text, audio, still images, animation, and video. Text can be created with word processors and includes plain text files. Still images are created with devices like scanners and include photos. Animation and video involve displaying a sequence of still images rapidly to depict motion, with video being digital recordings that are played back in real-time at rates of at least 30 frames per second. Common file sizes for digital video can be over 100 megabytes.