CD3

CD3 or CD-3 may be:
 * CD3 (immunology), an antigen, cluster of differentiation protein (immunology), part of the T cell receptor (TCR) complex on a mature T lymphocyte
 * Ford CD3 platform
 * MediaMax CD-3, copy protection scheme
 * MiniCD, a 3-inch CD
 * 3-inch CD single
 * Color Developing Agent 3, the color developer for E-6 process

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