CD3 or CD-3 may refer to:
* CD3, or
2020 CD3
(also 2020CD3 or CD3 for short) is a tiny near-Earth asteroid (or minimoon) that ordinarily orbits the Sun but makes close approaches to the Earth–Moon system, in which it can temporarily enter Earth orbit through temporary satellite captu ...
, a small
minimoon
Claims of the existence of other moons of Earth—that is, of one or more natural satellites with relatively stable orbits of Earth, other than the Moon—have existed for some time. Several candidates have been proposed, but none have been confi ...
of Earth
*
CD3 (immunology), an antigen, cluster of differentiation protein (immunology), part of the T cell receptor (TCR) complex on a mature T lymphocyte
*
Cost of delay Cost of Delay is "a way of communicating the impact of time on the outcomes we hope to achieve". More formally, it is the partial derivative of the ''total expected value'' with respect to ''time''. Cost of Delay combines an understanding of value w ...
(CD3 Prioritisation), an approach for scheduling work through a scarce resource that maximises
Return on Investment. (CD3 = CDx3 from Cost of Delay Divided by Duration).
*
Ford CD3 platform
*
MediaMax CD-3
MediaMax CD-3 is a software package created by SunnComm which was sold as a form of copy protection for compact discs. It was used by the record label RCA Records/ BMG, and targets both Microsoft Windows and Mac OS X. Elected officials and comp ...
, copy protection scheme
*
MiniCD, a ''3-inch CD''
**
3-inch CD single
A CD single (sometimes abbreviated to CDS) is a music single in the form of a compact disc. The standard in the Red Book for the term ''CD single'' is an 8 cm (3-inch) CD (or Mini CD). It now refers to any single recorded onto a CD of any si ...
*
Color Developing Agent 3, the color developer for
E-6 process and VNF-1 process.
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