Rare FCNC decay modes of charmed mesons are reviewed. The standard model
predictions, including both short and long distance contributions, are
summarized. Several new physics options that can give detectable signals are
described.Comment: 4 pages. Presented at the 6th International Conference on Hyperons,
Charm and Beauty Hadrons, IIT, Chicago, june 27-july 3, 2004. To be published
in the Proceeding