The 4 types of organic compounds and their subdivisions within living organisms are:
1. Carbohydrates:
 - Monosaccharides,
 - Oligosaccharides,
 - Polysaccharides.
2. Lipids:
 - Fats,
 - Phospholipids,
 - Waxes,
 - Sterols.
3. Proteins:
 - Primary structure (amino acid sequence),
 - The secondary structure,
 - The tertiary structure,
 - The quaternary structure.
4. Nucleic acids:
 - DNA (deoxyribonucleic acid),
 - RNA (ibonucleic acid).