Abstract This chapter constitutes one of the decision-making tools gathering the technical bases for the preselection of materials among commodity, engineering, specialty thermoplastics, thermoplastic elastomers (TPEs) and super-TPEs, alloys, and biosourced polymers. Products are classified in more than 70 subfamilies to avoid being lost in the multitude of grades. More than 500 pages, 150 tables, and 143 figures allow to position subfamilies of interest with respect to each other. After an overview of the general properties including advantages and drawbacks, special grades, prices, suitable transformation processes, and applications are examined the technological properties (tenacity, dimensional stability, and temperature behavior), durability (aging, creep, fatigue, chemical, and fire behavior), optical and electrical properties, environmental indicators (energy demand and CO2 emission), decoration and joining possibilities, specific ISO and ASTM standards, trade name, and producer examples. Numerous tables gather data related to neat and reinforced grade examples. After a first choice of solutions, designers must cooperate with chosen producers and processors to fix the final choice.