

The outer edge, when energized, flares into a brilliantly glowing nimbus of white light with a slight tint recalling the owner's circuitry color this active edge causes faint but visible ripples in the air when moved or thrown, and the air appears to shimmer around it when held still. Identity discs in the Tron system appear as solid metallic rings, hollow in the center and colored white or black to match the wearer's garb, with a glowing line circling their inner edge, again matching the circuitry color of their owners. Despite this appearance, they are still solid to one another, and ricochet from other discs with an audible clank. In flight, old-system discs appear as uniform circular planes of light in their owners' circuitry color, trailing comet-like tails as they fly towards their targets. The circuits glow more brightly when the disc is in use, and have been seen to change size or flash on and off when active. Identity discs issued to Game Grid programs appear as solid discs with several concentric rings on the surface, glowing with their owners' circuitry color. Everything seen, heard, or otherwise experienced is recorded on the wearer's disc.

They contain all that a program is, in the form of a detachable glowing disc normally worn on the upper back. Identity Discs (or Light Discs) are the most fundamental piece of equipment to programs in both the Game Grid and in the Tron system. Range and close combat weapon, Program data storage
