  Central Compact Objects (CCOs) are a handful of soft X-ray sources located
close to the centers of Supernova Remnants and supposed to be young,
radio-quiet Isolated Neutron Stars (INSs). A clear understanding of their
physics would be crucial in order to complete our view of the birth properties
of INSs. We will review the phenomenologies of CCOs, underlining the most
important, recent results, and we will discuss the possible relationships of
such sources with other classes of INSs.
