What is the full form of PVC, PET, HDPE, LDPE, PP and PS?

The required full forms are:

1) PVC - Polyvinyl Chloride

2) PET - Poly Ethylene Terephthalate

3) HDPE - High Density Polyethylene

4) LDPE - Low Density Polyethyelene

5) PP - Polypropylene

6) PS - Polystyrene