<unk>  is a discipline within chemistry which involves the scientific study of the structure, properties, composition, reactions, and preparation (by synthesis or by other means) of chemical compounds consisting primarily of carbon and hydrogen, which may contain any number of other elements, including nitrogen, oxygen, the halogens as well as phosphorus, silicon and sulfur. 
The original definition of<unk> " chemistry came from the misconception that<unk>  compounds were always related to life processes.  However,<unk>  molecules can be produced by processes not involving life, and not only<unk>  compounds support life on Earth, as life as we know it also depends on inorganic chemistry; for example, many enzymes rely on transition metals such as iron and copper; and materials such as shells, teeth and bones are part<unk> , part inorganic in composition.  Apart from elemental carbon, only certain classes of carbon compounds (such as oxides,  carbonates, and carbides) are conventionally considered inorganic. Biochemistry deals mainly with the natural chemistry of biomolecules such as proteins, nucleic acids, and sugars.
Because of their unique properties, multi-carbon compounds exhibit extremely large variety and the range of application of<unk>  compounds is enormous. They form the basis of, or are important constituents of many products (paints, plastics, food, explosives, drugs, petrochemicals, to name but a few) and (apart from a very few exceptions) they form the basis of all earthly life processes.
The different shapes and chemical reactivities of<unk>  molecules provide an astonishing variety of functions, like those of enzyme catalysts in biochemical reactions of live systems.
Current (as of 2008) trends in<unk>  include chiral synthesis, green chemistry, microwave chemistry, fullerenes and microwave spectroscopy.
Organic chemistry
Bioenergetics
Food chemistry
Electrostatics
Medicine
Nutrient
Electrode
Electron