CD

CD may be:

the symbol for the chemical element cadmium (Cd)
the abbreviated form of the SI unit of light intensity, candela
an initialism for Cash dispenser (at least used in Japan)
a Unix command, see cd (DOS / Unix Command)
an abbreviated version of the MS-DOS command chdir - see Cd (DOS / Unix Command)
an initialism for Certificate of deposit
an initialism for Ceske Drahy -- Czech Railways
a designation of a 1960s Panhard race car designed by Charles Deutsch
an abbreviation of Civil defense
an abbreviation for cluster of differentiation, (e.g. CD4 or CD8 lymphocytes).
an initialism for Compact disc; it can also refer to an Enhanced CD.
an abbreviation of Corps Diplomatique
the ISO country code for the Democratic Republic of the Congo
the Internet top-level domain for the Democratic Republic of the Congo, see .cd
an abbreviation for Circular dichroism