Like the sound systems mentioned earlier in the text, a video system is a collection of components: media storage unit, cameras, cabling/network, and output devices. A video reinforcement system is the combination of one or more cameras with QLab and its system of output devices in order to capture and play back live footage from a camera. Similar to the world of audio, the amount of technology needed for video and graphic systems can be quite extensive. If recording video for later playback, the computer will be used in conjunction with video editing software to edit audio and video components of the digital video file. Video output devices can be any of a number of types, from computer monitors, to televisions, projectors, or flat panel displays such as Liquid Crystalline Display or Light Emitting Diode monitors. The video card is an expansion card used to generate a video feed to output to a display.