Undoubtedly the chemistry of phosphorus appears more and more extra partaking in the sense that phosphorus presents a unprecedented versatile behaviour that allows the synthesis of quite a few completely totally different phosphorus reagents usable for functions in completely totally different fields, from biology to supplies science with out f- getting key functions in catalysis. The entire maturity of this matter of study might be outlined by all the acquired info over these twenty ultimate years. Pure and inorganic chemistries of P , P and P species have been the s- in ]V v ject of lots of of publications whereas the chemistry of low coordinated ph- phorus derivatives expert its hour of glory from the Nineteen Seventies to the early Nineteen Nineties. In parallel, interactions between phosphorus compounds and transition metals afforded many complexes, loads of which present fascinating properties as catalysts. The curiosity in all these themes truly should not be decreasing, definitely some fas- nating areas of study are rising or are the subject of many investigations: the medicinal chemistry of bisphosphonates, the place of phosphorus in biology, phosphorus ligands in radiopharmaceutical chemistry, phosphorus in supplies science, new polymers and dendrimers incorporating phosphorus, and as- metric catalysis to name nevertheless a few. Definitely researchers, benefitting from their background in main phosphorus chemistry are creating many new fields of study.